Which of the following molecules shows intramolecular hydrogen bonding?

If the atomic number of an element $\mathrm{X}$ is $7$, the best electron dot symbol for the element is ______.

What is the effect of more electronegative atom on the strength of ionic bond?

An element $\mathrm{X}$ with the electronic configuration ${\text{1s}}^{\text{2}}{\text{, 2s}}^{\text{2}}{\text{,2p}}^{\text{6}}{\text{,3s}}^{\text{2}}$ would be expected to form the chloride with the formula_____.

Which of the following compounds is covalent?

The number of electrons involved in the bond formation of ${\mathrm{N}}_{\mathrm{2}}$ molecule are ____.

Number of electrons in the valence orbit of nitrogen in an ammonia molecule is _____.