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Harman [31]
3 years ago
12

The mass number of a nucleus (except Hydrogen) is:

Chemistry
2 answers:
posledela3 years ago
8 0
Never less than its atomic number
This is because the mass number is the sum of both the number of neutrons and protons, while the atomic number is the number of protons. Hydrogen is the only element without neutrons.
Verizon [17]3 years ago
8 0
Never less than its atomic no.

Mass no. = protons + neutrons
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