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Biology, 06.03.2020 19:43 ahatton15

The mass number of an atom is the same as?
A. the protons it contains.
B. the neutrons it contains.
C. the number of protons and neutrons it contains.
D. the number of protons and electrons it contains.

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The mass number of an atom is the same as?
A. the protons it contains.
B. the neutrons i...
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