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Biology, 26.10.2020 01:00 Mamiwork2

What does the number 84 in krypton-84 represent A. the sum of protons and electrons.
B. the mass number.
C. the atomic number
D. twice the protons.

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What does the number 84 in krypton-84 represent A. the sum of protons and electrons.
B. the m...
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