Here's why:

* Protons: Positively charged particles in the nucleus of an atom.

* Electrons: Negatively charged particles orbiting the nucleus.

* Neutral Atom: An atom with an equal number of protons and electrons, resulting in no overall charge.

* Ion: An atom that has gained or lost electrons, giving it a net positive or negative charge.

When an atom loses electrons, it has more protons than electrons, resulting in a net positive charge. This positively charged ion is called a cation.