Question #22638

1 Answer

Answer:

The atomic number of# N_7^15 #
The number of protons is 7
The number of electrons is 7
The number of neutrons is 8

Explanation:

The atomic number of Nitrogen is 7 because Nitrogen has 7 protons.
The seven protons attract 7 electrons in the ground state.

If the atom had fewer or more than 7 protons the atom would not be Nitrogen.

The mass of the atom is the sum of protons and neutron. so

#p + n = mass#
(protons #(p)# and neutrons #(n)# both have an atomic mass of slightly larger then one, but for the purpose of this question we shall treeat their mass as equal to one).

Therefore

#7 + n = 15#, subtract 7 from both sides

# 7 -7 + n = 15 -7 #,

#n = 8 #, the number of neutrons.