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Protons in a potassium atom.
9
79
14
19
12
atomic mass
56
14
Tells the mass of the nucleus.
9
79
14
19
12
atomic mass
56
14
Neutrons in a silicon atom.
9
79
14
19
12
atomic mass
56
14
Electrons in a neutral fluorine atom.
9
79
14
19
12
atomic mass
56
14
Mass of a nitrogen atom.
9
79
14
19
12
atomic mass
56
14
Electrons in a neutral gold atom.
9
79
14
19
12
atomic mass
56
14
Neutrons in a sodium atom.
9
79
14
19
12
atomic mass
56
14
Protons in a barium atom.
9
79
14
19
12
atomic mass
56
14
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