Very Short Question and Answers - Molecule

A molecule is a group of two or more atoms that are chemically bonded together.

O₂ is a diatomic molecule made up of two oxygen atoms.

Atomicity is the number of atoms present in a molecule.

Oxygen (O₂) is a diatomic molecule.

A cation is a positively charged ion.

The ratio of hydrogen to oxygen in water (H₂O) is 2:1.

Sodium is a cation (Na⁺).

Helium (He) exists as a monoatomic molecule.

A covalent bond exists within a molecule formed by two hydrogen atoms.

The compound formed is ammonia (NH₃).