History of Atomic Theory Research the discoveries and experiments of scientists and their...

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History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/ Kent/Atomic Research site your sources Create a poster

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Page 1: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

History of Atomic TheoryResearch the discoveries and experiments of scientists and their contribution to “atomic theory”

use textbook & internet

Public/All/Kent/Atomic Research

site your sources

Create a poster

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Page 2: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Democritus & DaltonDemocritus (460 BC)

First to develop the idea that matter was made of “atoms”.

Dalton (1803)

Proposed the atomic theory

atoms are indivisible & indestructible

elements have unique atomic masses

Page 3: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Mendeleev (1869)

Developed the first basic periodic table

Table was arranged by atomic weight

was able to predict elements which hadn’t been found

Page 4: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

J.J. Thomson (1898)

• Discovered electrons (-e)• Atoms have — & + charges

Page 5: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Rutherford (1911)

Discovered the positively charged nucleus

shot positively charged particles through gold foil

electrons moved in circles

Page 6: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Bohr (1913)

Electrons move in specific energy levels (orbits) around the nucleus

Page 7: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Schrodinger (1926)

Described electrons as waves

Electron cloud

Page 8: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Chadwick (1932)

Neutrons (and protons) made

up the nucleus

Page 9: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Evolution of the

Atom

Page 10: History of Atomic Theory Research the discoveries and experiments of scientists and their contribution to “atomic theory” use textbook & internet Public/All/Kent/Ato.

Evolution of the Atom


Atomic Theory History of Atomic Theory - Honors Chemistry · History of Atomic Theory. Honors Chemistry. Unit 2: Atomic Theory and Structure. Learning Objectives: I can describe the

Atomic Theory History of Atomic Theory - Honors Chemistry · History of Atomic Theory. Honors Chemistry. Unit 2: Atomic Theory and Structure. Learning Objectives: I can describe the

Unit 3 Modern Atomic Theory Chpt 11 Modern Atomic Theory.

Unit 3 Modern Atomic Theory Chpt 11 Modern Atomic Theory.

Atomic theory

Atomic theory

4.1 Atomic Theory - Weebly · Web viewCh 4 - Atomic Theory 4.1 Atomic Theory Review Vocabulary – Theory New Vocabulary – Dalton’s Atomic Theory Main Idea -The ancient Greeks

4.1 Atomic Theory - Weebly · Web viewCh 4 - Atomic Theory 4.1 Atomic Theory Review Vocabulary – Theory New Vocabulary – Dalton’s Atomic Theory Main Idea -The ancient Greeks