Question

The nitride ion in lithium nitride is composed of :

• A. 7 protons and 7 electrons
• B. 10 protons and 7 electrons
• C. 7 protons and 10 electrons
• D. 10 protons and 10 electrons

Answer 1

The correct option is C 7 protons and 10 electrons

Lithium nitride is $L{i}_{3}N$ . Here, nitride ion is $N$ with $-3$ charge. Since atomic no. of nitrogen is 7.

So, the number of protons is $7$ and number of electrons will be $7+3=10$.

Hence, option C is correct.