Download Atomic theory - Sarah Simmons

ATOMIC THEORY
John Dalton-Atomic Theory
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All atoms of a given element are identical
Atoms of different elements have different masses
A compound is a specific combination of atoms of
more than one element
In a chemical reaction atoms are not created nor
destroyed; they exchange partners to produce new
substances
J.J. Thomson – Cathode Rays
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Discovered 1st subatomic particle
Plum Pudding Model - Thomson
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Atom made of jelly-like substance that is positively
charged.
Electrons spread throughout jelly-like material.
Gold Foil Experiment - Rutherford
Periodic Table
Periodic Table