History of the atom worksheet pdf Southland

History of the Atom Worksheet Atoms Electron Scribd Print History of the Atom Lesson for Kids Worksheet 1. In the 1700s, scientists thought that when different types of atoms are combined, which of the following can happen?

The Mystery of Matter “INTO THE ATOM” (Documentary)

History of the Atom Worksheet (scientist to know. 1. Each box below illustrates one of the models of the atom that was proposed during the course of history. Using scissors cut out the boxes. 2. Examine each of the models of the atom. 3. Arrange the models in the order that you think the models were proposed. 4. Predict the approximate date in history when you think each model was proposed. The, History of Atomic Theory . Timeline 400-350BC Greek Philosophers’ Views 1803 Modern Atomic Theory 1897 Electron Discovered 1911 Protons & Nucleus Discovered the atom is empty space and that protons are positively charged particles and are located in a dense nucleus at the center of the atom..

The History of the Atom Timeline: 400 BC Scientist: Democritus (Greek Philosopher) Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible). He thought that if you take a piece of matter and divide it and continue to divide it you will eventually come to a point where you could not The atom had a very dense (+) center. Rutherford called it the nucleus. Niels Bohr (1913) Niels Bohr improved on Rutherford’s model. Every atom has a specific number of electron shells. He proposed that electrons move around the nucleus in specific layers, or shells.

View Homework Help - History-of-the-Atom-Worksheet-and-Answer-Key (1) from CHEM 1200 at University of North Carolina, Charlotte. History of the Atom Directions: Fill in the blanks on the right with HISTORY OF THE ATOM 1856 -1940 Joseph John Thompson In 1904, Thompson develops the idea that an atom atom and are responsible for the stability of the atom. Chemistry Resources for High School Teachers and Students - PowerPoint Lessons, Notes, Labs, Worksheets, Handouts, Practice Problems, and …

Oct 27, 2019 · 51 best Atoms Ions and Isotopes images on Pinterest from History Of The Atom Worksheet, source: pinterest.com. History of Atomic Theory cut & paste & foldable Activity from from History Of The Atom Worksheet, source: pinterest.com. James Chadwick Atom Podcast from History Of The Atom Worksheet, source: pinterest.com Some of the worksheets for this concept are work development of atomic theory name true false atomic structure work atomic structure work activity 1 atomic discoveries atomic theory scientist timeline bohr model work atomic structure. Aristotle supported the idea of the atom. Once you find your worksheet click on pop out icon or print icon.

By 1932, scientists had discovered that the nucleus of an atom contains two types of particles: protons, which have a positive charge, and neutrons, which are neutral (have no charge). Both of these particles have about the same mass, which is much larger than the mass of an electron. Atomic Theory The History of the Atom - Student Worksheet Directions: each student in the group will answer the questions below in their own words and in complete sentences. 1. What did Democritus say about the atom (1 point)? 2. What did Aristotle believe about the atom (1 point)?

Start studying History of the Atom Worksheet. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Feb 22, 2018 · For the second half of the lesson (the history of the atom) I am going to stick the information sheets all over the room and give the students A3 copies of the history of the atom worksheets to fill in. You might want to run it as a carousel activity, or a marketplace activity if that suits your class better.

Some of the worksheets for this concept are work development of atomic theory name true false atomic structure work atomic structure work activity 1 atomic discoveries atomic theory scientist timeline bohr model work atomic structure. Aristotle supported the idea of the atom. Once you find your worksheet click on pop out icon or print icon. The atom had a very dense (+) center. Rutherford called it the nucleus. Niels Bohr (1913) Niels Bohr improved on Rutherford’s model. Every atom has a specific number of electron shells. He proposed that electrons move around the nucleus in specific layers, or shells.

Start studying History of the Atom Worksheet. Learn vocabulary, terms, and more with flashcards, games, and other study tools. the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9

6-volume history of science for middle-schoolers, from which this article is drawn. Her 10-volume set, A History of US,which American Educatorintroduced with articles in 1990 and 1993, earned the Michener Prize In Writing and is now being adapted for a PBS series called “Freedom” that will air early next year. All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. All atoms of the same elements are alike. (One atom of oxygen is like another atom of oxygen.) Atoms of different elements are different. (An atom of oxygen is different from an atom of hydrogen.) Atoms of different elements combine to form a compound.

The History of the Atom Timeline: 400 BC Scientist: Democritus (Greek Philosopher) Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible). He thought that if you take a piece of matter and divide it and continue to divide it you will eventually come to a point where you could not Topics history of the atom worksheet st francis preparatory school atoms of different elements are different an atom of oxygen is different from an atom of hydrogen atoms of different elements combine to form a compound these atoms have to be in definite whole number ratios for example water is a compound made up of 2 atoms of hydrogen and.

All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. All atoms of the same elements are alike. (One atom of oxygen is like another atom of oxygen.) Atoms of different elements are different. (An atom of oxygen is different from an atom of hydrogen.) Atoms of different elements combine to form a compound. History of the Atom Worksheet Name _____ Physical Science Hr_____ Write the name of the scientist who is credited with the following experiments or

History of the Atom Worksheet Sammons Sci

The History of the Atom Project Bainbridge High School. 1. Each box below illustrates one of the models of the atom that was proposed during the course of history. Using scissors cut out the boxes. 2. Examine each of the models of the atom. 3. Arrange the models in the order that you think the models were proposed. 4. Predict the approximate date in history when you think each model was proposed. The, throughout history and into this century, scientists strive to learn more about the atom and how to control it. For example, scientists are exploring how to use nuclear fusion — the joining of lighter nuclei to create a larger one — to generate power. 3. Provide students with a copy of The Smallest Matter Worksheet. Explain that Ernest.

Activity 1 Atomic Discoveries

History of the Atom Worksheet Sammons Sci. Sep 14, 2016 · The Mystery of Matter: Search for the Elements is an exciting series about one of the great adventures in the history of science: the long and continuing quest to understand what the world is … https://simple.m.wikipedia.org/wiki/List_of_elements_by_symbol History of the Atom – Worksheet/Review sheet Name: Answer Key Period:-1. State 2 similarities between Dalton’s and the Modern Day model of the atom. 1) Spherical in shape 2) Small Size 2. State the most important difference between Dalton’s and Thomson’s model of the atom..

Dec 11, 2018 · History Of The Periodic Table Timeline Worksheet Pdf masuzi December 11, 2018 Uncategorized Leave a comment 8 Views All periodic table the pdf and all periodic table the pdf and accommodation of the rare earths in periodic table a historical analysis by pieter thyssen and koen binnemans isbn 978 0 444 53590 new gcse chemistry 2017 history of Models Of The Atom Worksheet Solving Systems Of Equations By Substitution Worksheet Toddler Worksheets Structure And History Of The. Models Of The Atom Worksheet Slope Intercept Form Worksheet Anxiety Worksheets. Models Of The Atom Worksheet Long Division Worksheets Budget Worksheet Pdf Models Of The Atom.

Feb 22, 2018 · This FREE Science resource provides student friendly facts relating to the history of the atom. Also included is an associated worksheet which challenges students to find information in the factsheet. The worksheet also provides students with an opportunity to develop their knowledge further through independent or teacher led investigation. Atomic Structure Worksheet. Label the parts of an atom on the diagram below. 4. What type of charge does a proton have? 5. What type of charge does a neutron have? 6. What type of charge does an electron have? 7. Which two subatomic particles are located in the nucleus of an atom? 8.

All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. All atoms of the same elements are alike. (One atom of oxygen is like another atom of oxygen.) Atoms of different elements are different. (An atom of oxygen is different from an atom of hydrogen.) Atoms of different elements combine to form a compound. Lesson on the Structure of the Atom The following lesson would be part of a larger chemistry unit on the atomic model and the periodic table of the elements. Learning outcomes below are from the new 2006 Michigan Content Expectations for Science. Content Expectations

Start studying History of the Atom Worksheet (scientist to know). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Print History of the Atom Lesson for Kids Worksheet 1. In the 1700s, scientists thought that when different types of atoms are combined, which of the following can happen?

Atomic Theory The History of the Atom - Student Worksheet Directions: each student in the group will answer the questions below in their own words and in complete sentences. 1. What did Democritus say about the atom (1 point)? 2. What did Aristotle believe about the atom (1 point)? the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9

Dec 11, 2018 · History Of The Periodic Table Timeline Worksheet Pdf masuzi December 11, 2018 Uncategorized Leave a comment 8 Views All periodic table the pdf and all periodic table the pdf and accommodation of the rare earths in periodic table a historical analysis by pieter thyssen and koen binnemans isbn 978 0 444 53590 new gcse chemistry 2017 history of View Homework Help - History-of-the-Atom-Worksheet-and-Answer-Key (1) from CHEM 1200 at University of North Carolina, Charlotte. History of the Atom Directions: Fill in the blanks on the right with

throughout history and into this century, scientists strive to learn more about the atom and how to control it. For example, scientists are exploring how to use nuclear fusion — the joining of lighter nuclei to create a larger one — to generate power. 3. Provide students with a copy of The Smallest Matter Worksheet. Explain that Ernest Start studying History of the Atom Worksheet. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9 History Of The Atom. Showing top 8 worksheets in the category - History Of The Atom. Some of the worksheets displayed are , Historical changes in atomic models work, The history of the atom, Evolution of the atom key, Thomsons cathode ray tube experiment cathode rays are, A brief history of atoms, An atom apart, Atomic structure work.

Nov 10, 2019 · history of the atom worksheet answers history of the atom worksheet timeline history of atom timeline worksheet answer key timelione history of the atom worksheet history of an atom worksheet… Read More Oct 13, 2016 · The History of the Atom – Theories and Models. Click to enlarge All matter is made up of atoms. This is something we now take as a given, and one of the things you learn right back at the beginning of high school or secondary school chemistry classes.

History_of_the_Atom_Worksheet__ (1).doc What students are saying As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share … Oct 13, 2016 · The History of the Atom – Theories and Models. Click to enlarge All matter is made up of atoms. This is something we now take as a given, and one of the things you learn right back at the beginning of high school or secondary school chemistry classes.

Feb 22, 2018 · For the second half of the lesson (the history of the atom) I am going to stick the information sheets all over the room and give the students A3 copies of the history of the atom worksheets to fill in. You might want to run it as a carousel activity, or a marketplace activity if that suits your class better. History_of_the_Atom_Worksheet__ (1).doc What students are saying As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share …

History of the Atom – Worksheet/Review sheet

History of Atomic Theory. If you are interested in doing a similar activity and do not have access to Living by Chemistry I found a similar lesson from the American Association for the Advancement of Science (AAAS), The History of the Atom 5: The Modern Theory. This is a great lesson which could be used to have students do reading related to the modern theory., The History of the Atom Web quest! You are responsible for completing the History of the Atom worksheet. EACH PERSON must complete their own copy. Use the internet to find information. Most of us take it for granted that we know what an atom looks ….

Basic Atomic Structure Worksheet Prairie Science

history-of-the-atom-worksheet Atoms Electron Scribd. An Atom Apart by Leslie Cargile Have you ever walked through a cloud of gnats on a hot summer day, only to have them follow you? No matter how you swat at them, or even if you run, they won’t leave you alone. If so, then you have something in common with an atom. Atoms are the building blocks of molecules, which when combined, make up everything., Dec 11, 2018 · History Of The Periodic Table Timeline Worksheet Pdf masuzi December 11, 2018 Uncategorized Leave a comment 8 Views All periodic table the pdf and all periodic table the pdf and accommodation of the rare earths in periodic table a historical analysis by pieter thyssen and koen binnemans isbn 978 0 444 53590 new gcse chemistry 2017 history of.

History of the Atom. Introduction Our understanding of the physical world has grown at an incredible rate in the last 200 years. The key to the advances made in chemistry has been our growing knowledge about atoms. In this unit we will look at some of the early historical discoveries that helped us build up a useful 'working model' of the atom. Sep 29, 2016 · small, dense core of positively charged particles in the center (or nucleus ) of the atom, surrounded by a swirling ring of electrons . 1922 – Niels Bohr was a Danish scientist that worked with Rutherford. "Bohr Theory of the Atom" was the closest to the modern atomic theory, and it reemphasized the idea of electrons circling the nucleus.

The History of the Atom Timeline: 400 BC Scientist: Democritus (Greek Philosopher) Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible). He thought that if you take a piece of matter and divide it and continue to divide it you will eventually come to a point where you could not History of Atomic Theory . Timeline 400-350BC Greek Philosophers’ Views 1803 Modern Atomic Theory 1897 Electron Discovered 1911 Protons & Nucleus Discovered the atom is empty space and that protons are positively charged particles and are located in a dense nucleus at the center of the atom.

the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9 History of the Atom – Summary Sheet – ANSWER KEY Scientist Summary about Theory Reasons for it’s failure • This theory explains the LAW OF CONSTANT COMPOSITION • atoms combine to form molecules in a fixed ratio in a given chemical reaction.

An Atom Apart by Leslie Cargile Have you ever walked through a cloud of gnats on a hot summer day, only to have them follow you? No matter how you swat at them, or even if you run, they won’t leave you alone. If so, then you have something in common with an atom. Atoms are the building blocks of molecules, which when combined, make up everything. Print History of the Atom Lesson for Kids Worksheet 1. In the 1700s, scientists thought that when different types of atoms are combined, which of the following can happen?

A brief history of Atoms We currently believe that the atom is the basic unit of matter which consists of a dense nucleus surrounded by a cloud of negatively charged electrons. The nucleus contains a mix of positively charged protons and electrically neutral neutrons. diameter of the entire gold atom. Atomic Theory: Atoms are mostly empty space with a tiny, massive nucleus at the center . Why is the head of a pin compared to the diameter of a stadium like an atom? The diameter of a pinhead is 100,000 times smaller than the diameter of …

Start studying History of the Atom Worksheet (scientist to know). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Oct 13, 2016 · The History of the Atom – Theories and Models. Click to enlarge All matter is made up of atoms. This is something we now take as a given, and one of the things you learn right back at the beginning of high school or secondary school chemistry classes.

6-volume history of science for middle-schoolers, from which this article is drawn. Her 10-volume set, A History of US,which American Educatorintroduced with articles in 1990 and 1993, earned the Michener Prize In Writing and is now being adapted for a PBS series called “Freedom” that will air early next year. history-of-the-atom-worksheet - Free download as Open Office file (.odt), PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site. Search Search

Oct 27, 2019 · 51 best Atoms Ions and Isotopes images on Pinterest from History Of The Atom Worksheet, source: pinterest.com. History of Atomic Theory cut & paste & foldable Activity from from History Of The Atom Worksheet, source: pinterest.com. James Chadwick Atom Podcast from History Of The Atom Worksheet, source: pinterest.com Worksheets *Vocabulary: Atomic Structure pdf *Atomic Number and Mass Number pdf *Ions and Subatomic Particles pdf *Development of the Atomic Theory pdf (history of the Atom paragraph) *Light Problems pdf *Half-life of Radioactive Isotopes pdf Quantum Mechanics and Electron Configuration (paragraph) *Atom, Mass, and the Mole pdf

Atomic Theory Timeline. Purpose: By completing this activity, students will learn how the understanding of the atom progressed . throughout history and how scientific models change with the introduction of new evidence. Requirements: Create a timeline of atomic theory. ***It must be an actual, physical timeline, not just an outline listing the Oct 13, 2016 · The History of the Atom – Theories and Models. Click to enlarge All matter is made up of atoms. This is something we now take as a given, and one of the things you learn right back at the beginning of high school or secondary school chemistry classes.

An Atom Apart by Leslie Cargile Have you ever walked through a cloud of gnats on a hot summer day, only to have them follow you? No matter how you swat at them, or even if you run, they won’t leave you alone. If so, then you have something in common with an atom. Atoms are the building blocks of molecules, which when combined, make up everything. Atomic Theory – Scientist Timeline KEY Below is a list of individuals that have made significant contributions to the concept of the atomic theory. Your task today is to match the scientist with the appropriate description. Some scientists will have more than one description associated with them. Activity 1: Timeline

throughout history and into this century, scientists strive to learn more about the atom and how to control it. For example, scientists are exploring how to use nuclear fusion — the joining of lighter nuclei to create a larger one — to generate power. 3. Provide students with a copy of The Smallest Matter Worksheet. Explain that Ernest By 1932, scientists had discovered that the nucleus of an atom contains two types of particles: protons, which have a positive charge, and neutrons, which are neutral (have no charge). Both of these particles have about the same mass, which is much larger than the mass of an electron.

Evolution of the atom KEY Quia

Atomic Theory – Scientist Timeline. Sep 29, 2016 · small, dense core of positively charged particles in the center (or nucleus ) of the atom, surrounded by a swirling ring of electrons . 1922 – Niels Bohr was a Danish scientist that worked with Rutherford. "Bohr Theory of the Atom" was the closest to the modern atomic theory, and it reemphasized the idea of electrons circling the nucleus., History_of_the_Atom_Worksheet__ (1).doc What students are saying As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share ….

www.menifee.k12.ky.us

The Mystery of Matter “INTO THE ATOM” (Documentary). Lesson on the Structure of the Atom The following lesson would be part of a larger chemistry unit on the atomic model and the periodic table of the elements. Learning outcomes below are from the new 2006 Michigan Content Expectations for Science. Content Expectations https://rontavstudio.com/define-group-number-on-periodic-table/history-of-the-periodic-table-wikipedia-263/ History of the Atom Worksheet Name _____ Physical Science Hr_____ Write the name of the scientist who is credited with the following experiments or.

History Of The Atom. Showing top 8 worksheets in the category - History Of The Atom. Some of the worksheets displayed are , Historical changes in atomic models work, The history of the atom, Evolution of the atom key, Thomsons cathode ray tube experiment cathode rays are, A brief history of atoms, An atom apart, Atomic structure work. the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9

History of the Atom – Worksheet/Review sheet Name: Answer Key Period:-1. State 2 similarities between Dalton’s and the Modern Day model of the atom. 1) Spherical in shape 2) Small Size 2. State the most important difference between Dalton’s and Thomson’s model of the atom. the Atom for Middle School . Table of Contents 1. Accessing Prior Knowledge Activity 2. The Atomic Model Worksheet and Key 3. The Atomic Model of Matter Graphic Organizer and key 4. Atomic Model of Matter Worksheet and key 5. Atom Notes 6. Complete Model of Atom Graphic Organizer and Key 7. Vocabulary Review and Key 8. Periodic Table 9

throughout history and into this century, scientists strive to learn more about the atom and how to control it. For example, scientists are exploring how to use nuclear fusion — the joining of lighter nuclei to create a larger one — to generate power. 3. Provide students with a copy of The Smallest Matter Worksheet. Explain that Ernest Feb 22, 2018 · This FREE Science resource provides student friendly facts relating to the history of the atom. Also included is an associated worksheet which challenges students to find information in the factsheet. The worksheet also provides students with an opportunity to develop their knowledge further through independent or teacher led investigation.

A brief history of Atoms We currently believe that the atom is the basic unit of matter which consists of a dense nucleus surrounded by a cloud of negatively charged electrons. The nucleus contains a mix of positively charged protons and electrically neutral neutrons. View Homework Help - History-of-the-Atom-Worksheet-and-Answer-Key (1) from CHEM 1200 at University of North Carolina, Charlotte. History of the Atom Directions: Fill in the blanks on the right with

All elements are composed (made up) of atoms. It is impossible to divide or destroy an atom. All atoms of the same elements are alike. (One atom of oxygen is like another atom of oxygen.) Atoms of different elements are different. (An atom of oxygen is different from an atom of hydrogen.) Atoms of different elements combine to form a compound. history-of-the-atom-worksheet - Free download as Open Office file (.odt), PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site. Search Search

Atomic History Worksheet Answer Key Democritus Proposes the Atom 1. The word atom comes from a Greek word that means indivisible 2. Which of the following statements is … Feb 22, 2018 · This FREE Science resource provides student friendly facts relating to the history of the atom. Also included is an associated worksheet which challenges students to find information in the factsheet. The worksheet also provides students with an opportunity to develop their knowledge further through independent or teacher led investigation.

History of Atomic Theory . Timeline 400-350BC Greek Philosophers’ Views 1803 Modern Atomic Theory 1897 Electron Discovered 1911 Protons & Nucleus Discovered the atom is empty space and that protons are positively charged particles and are located in a dense nucleus at the center of the atom. History of Atomic Theory . Timeline 400-350BC Greek Philosophers’ Views 1803 Modern Atomic Theory 1897 Electron Discovered 1911 Protons & Nucleus Discovered the atom is empty space and that protons are positively charged particles and are located in a dense nucleus at the center of the atom.

Oct 27, 2019 · 51 best Atoms Ions and Isotopes images on Pinterest from History Of The Atom Worksheet, source: pinterest.com. History of Atomic Theory cut & paste & foldable Activity from from History Of The Atom Worksheet, source: pinterest.com. James Chadwick Atom Podcast from History Of The Atom Worksheet, source: pinterest.com History of the Atom Worksheet Name _____ Physical Science Hr_____ Write the name of the scientist who is credited with the following experiments or

Atomic Theory The History of the Atom - Student Worksheet Directions: each student in the group will answer the questions below in their own words and in complete sentences. 1. What did Democritus say about the atom (1 point)? 2. What did Aristotle believe about the atom (1 point)? Print History of the Atom Lesson for Kids Worksheet 1. In the 1700s, scientists thought that when different types of atoms are combined, which of the following can happen?

Worksheets *Vocabulary: Atomic Structure pdf *Atomic Number and Mass Number pdf *Ions and Subatomic Particles pdf *Development of the Atomic Theory pdf (history of the Atom paragraph) *Light Problems pdf *Half-life of Radioactive Isotopes pdf Quantum Mechanics and Electron Configuration (paragraph) *Atom, Mass, and the Mole pdf 1. Each box below illustrates one of the models of the atom that was proposed during the course of history. Using scissors cut out the boxes. 2. Examine each of the models of the atom. 3. Arrange the models in the order that you think the models were proposed. 4. Predict the approximate date in history when you think each model was proposed. The

History of the Atom – Summary Sheet – ANSWER KEY Scientist Summary about Theory Reasons for it’s failure • This theory explains the LAW OF CONSTANT COMPOSITION • atoms combine to form molecules in a fixed ratio in a given chemical reaction. By 1932, scientists had discovered that the nucleus of an atom contains two types of particles: protons, which have a positive charge, and neutrons, which are neutral (have no charge). Both of these particles have about the same mass, which is much larger than the mass of an electron.