The balanced symbol equation for the reaction between magnesium (Mg) and dilute hydrochloric acid (HCl) is:

Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)

Here's what each part represents:

* Mg(s): Magnesium in its solid state

* 2HCl(aq): Two molecules of hydrochloric acid dissolved in water (aqueous solution)

* MgCl₂(aq): Magnesium chloride dissolved in water (aqueous solution)

* H₂(g): Hydrogen gas

This reaction is a single displacement reaction where magnesium displaces hydrogen from hydrochloric acid, forming magnesium chloride and releasing hydrogen gas.