What is a definition of a molecule?

The simplest and smallest component of any material is an atom. Atoms assist in forming molecules by joining together through a variety of linkages. Chemical bonds allow different atoms to be joined in specific amounts to form molecules. A molecule has no charge, which indicates that it is neutral by nature. A material is made up of many tiny pieces called atoms. Any substance or complex may be broken down into these fundamental parts. The molecule was composed of atoms. A molecule is defined as having two or more of the same or distinct atoms in any combination. A molecule is made up of different atoms that are connected by chemical bonds.

The valence electrons in the atoms contribute to the bonding between the same or different atoms. The atoms can share these electrons to create binding pairs known as covalent bonds. Because the atoms are bound together in a way that satisfies their octet and the entirety of their outer shell, which gives any molecule electrical neutrality, a molecule is said to be a neutral species without having any charge.

As a result, a molecule is defined as a chemical entity made up of two or more atoms that are chemically connected to one another and share electrons to complete their octet, giving the molecule electrical neutrality.

Hence option (A) is correct.