consult the periodic table on page 180 in your reading material and then. based on the explanation of the?

meanings of the various table numbers given in the the text calculate how many neutrons there are in a phosphours atom.

As your reading material says….

Atomic weight = Protons + Neutrons (since electrons have a negligible mass). So find the atomic # (which is the # of protons) and subtract that from the weight.

1

P=atomic number 15 (15 protons
P atomic weight 31 (15 protons +16 NEUTRONS

c