The number of protons,neutrons and electrons in the ion ${ }_{16}^{32} S^{2-}$ respectively are

The nitride ion in lithium nitride is composed of:

Assertion : The sum of protons and neutrons is always different in isobars.
Reason : Isobars are atoms of different elements having same mass number but different atomic number.

Which of the following pairs are isoelectronic with one another?

Isobars are atoms with

Which one of the following pairs represents isobars?