Here's a breakdown:

* Mg: Represents the element magnesium.

* Cl: Represents the element chlorine.

* 2: Indicates that there are two chlorine atoms for every one magnesium atom.

Magnesium chloride is an ionic compound. This means it is formed by the electrostatic attraction between positively charged magnesium ions (Mg²⁺) and negatively charged chloride ions (Cl⁻).

Magnesium chloride has various applications, including:

* De-icing roads and walkways

* Treating magnesium deficiencies in plants and animals

* Producing magnesium metal

* Used in fire extinguishers

* As a component in some food additives