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WHSCHEM1HISTORY

brookep

WHSCHEM1HISTORY

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Across
1."Gold foil" experiment to prove existence of nucleus.
3.Discovered the electron and "plum pudding" model of the atom.
4.Discovered the neutron.
7.Discovered positively charged "canal rays" using cathode ray tube.
9.Atoms of the same element but different number of neutrons.
10.Used "planetary" model showing electrons orbiting the nucleus.
Down
2.First to suggest idea of atoms; Greek philosopher.
5.Subatomic particle with same mass of a proton but no charge.
6.Positive electrode in a cathode ray tube.
8.Had earliest idea of early atomic theory explaining behavior of atoms.

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