Identify the number of protons, neutrons and electrons in 14/7 N

Question

Question from physical science 11th edition by Bill Tillery.

Answer 1

Nitrogen has two stable isotopes: Nitrogen-14 and Nitrogen-15. These occur because they have different amounts of neutrons within their nuclei.

 

Nitrogen is the 7th element in the periodic table so it has 7 Protons and an equal number of electrons (7!). Since the mass number given is 14 then number of neutrons = 14 ( - 7 (number of protons) = 7