Question

The nitride ion in lithium nitride is composed of how many electrons and protons?

Answer 1

Number of electrons in nitride ion

• The formula of lithium nitride is ${\mathrm{Li}}_3\mathrm{N}$.
• Here, the charge of the nitride ion is $-3$.
• The atomic number of nitrogen is $7$. So, it has $7$electrons.
• Now, the number of electrons in ${\mathrm{N}}^{3-}$is $7+3=10$.

Number of protons in nitride ion

• The atomic number of nitrogen is $7$.
• The atomic number is equal to the number of protons.
• So, the number of protons in ${\mathrm{N}}^{3-}$ is $7$.

So, the number of electrons and protons in nitride ion is $10$, and $7$.