What is the number of protons in the nucleus of an atom equivalent to? number of neutrons atomic number mass number atomic weight

Answer: atomic number

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Atomic weight is the weight of an atom. It is equal to the number of protons and neutrons, with a little extra added by the electrons.

Thus the number of protons in the nucleus of an atom equivalent to atomic number

6

Explanation:

The atom number 6 is the carbon. To calculate the number of neutron you need to substract the atomic weight and the number of the atom. The weight is 12 and the number is 6 so 12-6 equal 6 equal to the number of proton