Answer:

An ion is a positively or negatively charged atom (or group of atoms). An ion is formed by the loss or gain of electrons by an atom, so it contains an unequal number of electrons and protons. Example: Sodium ion Na +, magnesium ion Mg 2+, chloride ion Cl –, and oxide ion O 2–

Explanation:

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Answer:

Sodium is one of the example of ion. An ion is an atom or molecule with a net electrical charge. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions or by combination of ions with other particles or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms.