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WHSCHEM1ATOMS

Sarah Richards

WHSCHEM1ATOMS

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Across
4.developed the planetary model
8.made when two or more elements are bonded together through a chemical reaction
9.atoms that come from the same place
12.discovered the existence atoms
14.any atom(s) with a positive charge
17.smallest particle of an element that retains properties of that element
18.discovered the nucleus
19.substance consisting of atoms which have the same number of protons
20.vertical columns on the periodic table
21.confirmed all elements are composed of atoms
Down
1.horizontal rows on a periodic table
2.total number of protons and neutrons (2 Words)
3.any atoms(s) with a negative charge
5.number of protons in the nucleus (2 Words)
6.houses protons and electrons
7.positively charged subatomic particles
10.negatively charged subatomic particles
11.outermost - stable elements
13.confirmed the existence of neutrons
15.no charge-subatomic particle
16.believed electrons existed in all atoms

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