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WHSCHEM|HISTORY

shaelync

WHSCHEM|HISTORY

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6         7      
   
   
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9          

Across
1.This part of the atom houses protons and neutrons.
2.Used the now famous "gold foil" experiment to prove the existence of the nucleus.
4.Credited with the development of an early atomic theory to explain the behavior of atoms.
5.Credited with the discovery of the neutron.
6.Discovered positively charged "canal rays" using a modified cathode ray tube.
9.Subatomic particle located in the nucleus which has a positive charge.
Down
1.Subatomic particle that has the same mass of a proton, but unlike the proton, has no charge.
3.First to suggest the idea of atoms.
7.Credited with the discovery of the electron and the "plum pudding" model of the atom.
8.Credited with the "planetary" model of the atom that shows electrons orbiting the nucleus.

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