atomic mass = # neutron - # proton
atomic number = # proton
# neutron = atomic mass - # proton
What are the differences in the compositions of the following pairs of atomic nuclei?
a) 21083Bi has one fewer proton and one more neutron than 20982Pb.
b) 21083Bi has the same number of protons and one more neutron than 20982Pb.
c) 21083Bi has one more proton and the same number of neutrons than 20982Pb
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