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Atomic theory.

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Presentation on theme: "Atomic theory."— Presentation transcript:

1 Atomic theory

2 John Dalton-Atomic Theory
All matter consists of atoms, tiny indivisible particles of an element that cannot be created or destroyed. Atoms of one element cannot be converted into atoms of another element. In chemical reactions, the atoms of the original substances recombine to form different substances Atoms of an element are identical in mass and other properties and are different from atoms of any other elements. Compounds result from the chemical combination of a specific ratio of atoms of different elements.

3 J.J. Thomson – Cathode Rays
Discovered 1st subatomic particle-electron

4 Milikan’s Oil Drop Experiment

5 Plum Pudding Model - Thomson
Atom made of jelly-like substance that is positively charged. Electrons spread throughout jelly-like material.

6 Gold Foil Experiment - Rutherford

7 Periodic Table

8 Periodic Table

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