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WHSCHEM1ATOMS

GMcpherson

WHSCHEM1ATOMS

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Across
5.Part of the atom that houses protons and neutrons
7.Credited with the earliest idea of atoms existing
8.Atoms of the same element that have a different number of neutrons
9.Developed an early atomic theory to explain the behavior of atoms (2 Words)
11.A subatomic particle in an atom with a negative charge
12.Invented the plum pudding model of an atom (2 Words)
13.Credited with the discovery of the neutron (2 Words)
Down
1.The simplest form of matter that can exist under laboratory conditions
2.Used the "gold foil" experiment that is now famous (2 Words)
3.Vertical rows in the periodic table
4.Horizontal numbered rows in the periodic table
6.Made up of two different elements, can only be separated by a chemical reaction
10.A subatomic particle in an atom with a positive charge

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