Namrata and S P Singh Solutions for Chapter: Atoms, Molecules and Radicals, Exercise 1: EXERCISE

The valency of sodium is one. Write the molecular formula for the following compounds of sodium.

Sodium nitrate.

What is variable valency? Give two examples of elements showing variable valency.

Give the group number of the following element present in the periodic table.

Magnesium

Give the group number of the following element present in the periodic table.

Carbon

Give the group number of the following element present in the periodic table.

Sulphur

Give the group number of the following element present in the periodic table.

Neon

An element belongs to group $\mathrm{VA}$. What would be its valency? Name two such elements.

An element belongs to group $\mathrm{II}$. What would be its valency? Write the formulae of molecules of compounds it will form with elements in $\mathrm{VA}, \mathrm{VIA}$ and $\mathrm{VIIA}$ groups.