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Lithium has an atomic mass of 7 and an atomic number of 3 so the number of neutrons must be

Lithium has an atomic mass of 7 and an atomic number of 3 so the number of neutrons must be
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Lithium has an atomic mass of 7 and an atomic number of 3 so the number of neutrons must be

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User RichardMc
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4 because neutrons = atomic mass - atomic number
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User Oinak
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