Unit 2 Chem People

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Last updated 3:46 AM on 10/2/26
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6 Terms

1
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Democritus

Atomos model: matter is made of tiny, indivisible particles called atomos.

2
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Dalton

Billiard Ball model: atoms are solid, indivisible spheres.

3
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Thomson

Plum Pudding model: electrons are embedded in a positively charged sphere.

4
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Rutherford

Nuclear model: a small, dense, positive nucleus; most of the atom is empty space.

5
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Bohr

Planetary model: electrons occupy specific energy levels around the nucleus.

6
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Moseley

Modern periodic table: elements are arranged by atomic number.