Question

State the type of bonding in the following molecule:

1. Water
2. Calcium oxide.

Answer 1

Type of bonding:

1. A covalent bond is formed between the atoms of the non-metal element. The atoms can be of the same element or different elements. e.g. ${\mathrm{H}}_2\mathrm{O}$
2. An ionic bond is formed between the metal ion and non-metal. e.g. $\mathrm{NaCl}$
3. A coordinate bond is formed between the molecule containing lone pair and a positively charged ion( generally ${\mathrm{H}}^{+}$ion). e.g. ${\mathrm{NH}}_4^{+}$

Hence,

1. Water $\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{O}\mathbf{\right)}$: The constituent atom is $\mathrm{H}$ and $\mathrm{C}$ both are non-metal so the bond between them will be a covalent bond
2. Calcium Oxide $\mathbf{\left(}\mathbf{CaO}\mathbf{\right)}$: The constituent atom is $\mathrm{Ca}$ and $\mathrm{O}$, in which $\mathrm{Ca}$ is metal and $\mathrm{O}$ is non-metal. so the type of bond will be an ionic bond.