Question

the nucleus of an atom has 7 protons 8 neutrons, what would be the number of valence electrons​

Answer 1

There are 7 electrons in atom

Answer 2

Answer:

Assuming that the atom is neutral, we can say that-

number of electrons = number of protons

Therefore, no of electrons = 7

The electronic configuration of such an atom would be 2,5.

Thus the number of valence electrons (outermost electrons) is 5.

PS this is a nucleus of Nitrogen.