Calculate the number of protons, neutrons and electrons respectively in `""_(7)^(14) N^(3-)`

Options

A. `7, 10, 7`
B. `7, 7, 10`
C. `10, 7, 7`
D. `7, 7, 7`

Answer

B

Explanation

`""_(7)^(14)N^(3-)` nitrogen has an atomic nuber of 7. So, it has 7 proton.To find the nuber of neutrons, have to substract the atomic nuber from the atomic mass So, atomic mass of nitrogen is 14.
Neutron is- `underset((A.M))14-underset((A.N))7=7.`
When an ion has a negative charge, the atom has gained electrons, therefore to calculate the total number of present electrons, have to ass the amount of extra charge to the atomic number, so, 7 + 3 = 10 electrons.