We cannot break a molecule of a compound into its constituent elements.

Atomicity is defined as the number of atoms joined together to form a molecule of an element.

The compound potassium nitrate (KNO3) is made up of potassium (K+) and nitrate ([NO3]–) ions.

Valency of an element can be determined by its period in the periodic table.

The chemical formula of a compound tells us about the elements or ions of that compound.

The molecular mass of water can be obtained by adding up the masses of all the atoms present in the molecule.

There is not a single element existing as a radical.

Molecule is electrically neutral.

There are many elements existing as molecules.

Which of the following is not true for valency?

Which of the following have their valency zero (0)?

Which of the following have variable valencies?

What is gained by an atom for it to form an anion?