Which has a neutral charge? a proton a molecule an ion an electron

Option (b) is the correct answer.

Explanation:

Every element contains three sub-atomic particles which are protons, neutrons and electrons.

Inside the nucleus of an atom, there will be only protons and neutrons. Whereas electrons revolve around the nucleus of an atom.

Protons have a positive charge, neutrons have no charge and electrons have a negative charge.

When a neutral atom gains an electron then it becomes a negatively charged ion and when it loses an electron then it becomes positively charged ion.

Whereas a molecule is defined as the substance that contains two or more different elements which are chemically combined to each other in a fixed ratio by mass.

For example, is a molecule.

And, in a molecule due to same presence of charges on the combining atoms they tend to cancel out each other. Therefore, a molecule will have a neutral charge.

Thus, we can conclude that out of the given options a molecule has a neutral charge.