Question

Question #22638

Answer 1

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.