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Atoms

Across
Same number of protons - Different number of neutrons
You can think the of neutrons as the "____" of the nucleus
Same number of protons and neutrons
Smallest unit of
Central part of the atom
"______" among the neutrons and protons keep the nucleus together
Down
Conduct heat better than nonmetals
List of elements and their properties
Periodic table is arranged by this
Number of protons in an atom
The surrounding particles of the nucleus
An unstable atom becomes this by giving off energy and particles