Atomic nucleus: the mass number of an atom is equal to the number of what particles in the nucleus?
a)
electrons
b)
nucleons
c)
neutrons
d)
protons
e)
positrons

Nucleons

Explanation:

MASS NUMBER :

Mass number is denoted by AMass number is the sum of number of proton and number of neutron in the atom.Both proton and neutron are present in the nucleolus pf the atom and are called nucleons So the mass number of an atom is equal to the number of nucleons Number of nucleons = number of proton+number of neutron

Iwould sure like to answer your question but i honestly just don’t know