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Chemistry unit 4 Vocab.

Across
Horizontal arrangements of the periodic table.
The number of isotopes that are naturally occuring
Have both properties of both metal and non metal
An atom or group of atoms that have a positive or negative charge.
Vertical arrangement on the periodic table
Down
1/2 the distance between the nuclei of the same elements
Positive charged ion
A negative charged ion
Set up the current arrangement of the periodic table
The number of protons in the nucleus determines what