pepetav pepetav

29-06-2020
Chemistry

contestada

31. The mass number of a nucleus is :
a) always less than its atomic number: b) the sum of the number of protons and neutrons present in
the nucleus; c) always more than the atomic weight; d) a fraction.

Respuesta :

maryamkhajehaminian1 maryamkhajehaminian1

29-06-2020

Answer:hello

I think b is correct.

Explanation:

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