deduce from the datum provided
12 6c neutron number
39 19k proton number
80 35Br atomic number
65 30Zn atomic mass number
16 8 0 electron number
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Nucleus Atomic number, Z
Mass number, A
Number of protons = atomic number
Number of neutrons =A−Z
6
13
C
6 13 6 13−6=7
8
16
O
8 16 8 16−8=8
12
24
Mg 12 24 12 24−12=12
26
56
Fe 26 56 26 56−26=30
38
88
Sr 38 88 38 88−38=50
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