Evolution of Atomic Model: A Historic Journey

Nov 29, 2025

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Explore the fascinating history of the atomic model from its inception to modern theories. Delve into the contributions of notable scientists and the evolution of our understanding of the atom.

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Evolution of Atomic Model: A Historic Journey

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Originally created by D. Enns, United Nations International School The History of the Atomic Model

The History of Atomic Theory

The History of Atomic Theory. 2. Cartoon of the day…. Today’s Warm-up. Warm-up: Black-box With your lab group of 4, investigate and predict (w/out opening) what is in your “black box” How did you come to that conclusion? What senses did you use? Did you use any tools?

1.39k views • 24 slides

History of the Atomic Model

History of the Atomic Model. Seeing the Invisible. A Big Debate. Can matter be divided into smaller and smaller pieces forever?. What do you think?. YES!. NO!. Aristotle’s Claim. The universe consists of the following Earth Water Fire Wind Void . Atomic Models: Greek.

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History of the Atomic Theory

History of the Atomic Theory. Law of Definite Proportions. A given compound contains the same elements in exactly the same proportions by mass, regardless of the size of the sample or the source of the compound e.g. NaCl always contains 39.34% by mass of sodium and 60.66% by mass of Chlorine.

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The History of Atomic Theory

The History of Atomic Theory. Mr Nelson. Democritus. 400 BC. The Greek philosopher Democritus began the search for a description of matter more than 2400 years ago.

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The History of Atomic Structure

The History of Atomic Structure. Aliese, Aoife, Lauren. In short. Democritus + Greek philosophers John Dalton Dmitri Mendeleev J.J. Thomson Ernest Rutherford Max Planck Niels Bohr Edwin Schrodinger James Chadwick. Democritus and ancient Greek philosophy, circa 400-500 BCE.

728 views • 18 slides

The History of Atomic Structure

The History of Atomic Structure. Democritus. Named the atom from the Greek word “atomos” meaning indivisible. Wrote that atoms were the smallest unit of matter to keep its identity. John Dalton. England 1780’s All matter is made up of atoms. All atoms of the same element are the same.

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The history of atomic theory

The history of atomic theory. By. Ms. Sara. J. Ball. Democritus, the greek philosopher. Atoms exist as tiny particles of matter that make up matter. Democritus, the greek philosopher. Atoms exist as tiny particles of matter that make up matter. Democritus, the greek philosopher.

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History of the Atomic Model

History of the Atomic Model. Review for Quiz. Match the Atomic Model to the Person who designed the model. Use the Models Above Niels Bohr John Dalton Ernst Rutherford J.J . Thomson. Niels Bohr - D John Dalton - A Ernst Rutherford - C J.J. Thomson - B. Use the Models Above

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History of the Atomic Model

History of the Atomic Model. Review for Quiz. Match the Atomic Model to the Person who designed the model. Use the Models Above Niels Bohr John Dalton Ernst Rutherford J.J. Thomson. Niels Bohr - D John Dalton - A Ernst Rutherford - C J.J. Thomson - B. Use the Models Above

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Outline the history of the atomic model.

Outline the history of the atomic model. Agenda for Tuesday Dec 14 th Atoms Atomic mass, #, protons, etc. Atoms. Nucleus in the center Protons and neutrons Electrons on outside of nucleus Electron cloud model Electrons exist in energy levels – based on # of electrons.

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The Atomic Model

The Atomic Model. An atom is the smallest component of an element that retains the characteristics of the element. Define: Atom. If you broke apart any one atom, it would be made of three parts- and it wouldn ’ t be the atom anymore. Atoms are made from three different sub-atomic particles:.

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History of the Atomic Model

History of the Atomic Model. Democritus (400 BC). History of the Atomic Model. Democritus (400 BC) Reasoned that matter was composed of a few indivisible units that combine to make everything around us. History of the Atomic Model. Democritus (400 BC) John Dalton (1800).

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History of the Atomic Model

History of the Atomic Model. Greeks (300 B.C). Hypothesized that matter cut into smaller and smaller pieces would eventually reach the atom (literally meaning indivisible) Thought there were 4 elements: Air, Fire, Earth, Water Findings based on reason, not empirical evidence

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The Atomic Model

The Atomic Model. Chem 9. The Greek Model. Democritus - A Greek Philosopher, 400 BC. Concluded that matter could not be divided into smaller and smaller pieces forever. Eventually, the smallest piece of matter would be found. He used the word "Atomos“ meaning indivisible.

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The History of Atomic Theory

The History of Atomic Theory. A piece by piece progression through the structure of the atom. What is Atomic Theory. Atomic theory states that all matter is composed of discrete units called atoms The Greek word atomos means “indivisible”

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Development of the Atomic Model

Development of the Atomic Model. The Ancient Alchemists. Time: 500 BC – AD 1720 Many were dedicated to finding a substance that would transmute (change) metals into gold. Also interested in prolonging human life. Laid the foundation for modern chemistry. Democritus. Time: 442 BC

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The History of Atomic Structure

The History of Atomic Structure.

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The History of Atomic Theory

The History of Atomic Theory. By Daniel Cooke. Presentation Outline. Introduction Ancient Atomic theory The Modern Atomic Theory Rutherford's Experiment Bohr’s Model Quantum Theory of the Atom. Introduction.

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The History of Atomic Theory

The History of Atomic Theory. Democritus. Greek philosopher 2400 years ago The Atom Could matter be divided into smaller and smaller pieces forever? O r was there a limit to the number of times a piece of matter could be divided ?. Atomos.

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The History of Atomic Theory

The History of Atomic Theory. Atomic Models. At right is the image most people have of what an atom looks like. It shows electrons in various energy levels orbiting a nucleus.

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History of the Atomic Theory

History of the Atomic Theory. Unit 3 L.1 The Atom. Aristotle & other Early Thinkers…. Thought all things (matter) was made up of the 4 “elements” – earth , water, air , & fire. Democritus, 440 B.C. Greek Philosopher.

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The History of The Atomic Theory

The History of The Atomic Theory. Democritus. 470-380 BC Greek Philosopher Disciple of Leucippus Agreed with Leucippus Named small particles “atomos” (means indivisible) Thought there were different types of atoms Differed in size and shape

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