In a double bond connecting two atoms,there is a sharing of

The number of electrons involved in the bond formation of $N_2$ molecule is:

In which of the following species $p\pi - d\pi$ bond is present but $p\pi - p\pi$ bond is absent?

On decreasing the internuclear distance below the optimum distance (where potential energy is minimum),there is a steep increase in potential energy due to:

Why does $NH_{3}$ have three covalent bonds but not a triple bond?

The bond between two identical non-metal atoms has a pair of electrons: