In a salt what charge does the halogen element have when it gains an electron?

In a salt halogen element have negative charge if it gain an electron.

Explanation:

Fluorine,chlorine, bromine and iodine belongs to the family of halogen elements.These elements have high tendency to acquire electron due their high electronegativity.

      When a halogen element forms a salt for example potassium chloride(KCl), the Cl or chlorine is a halogen element which get negative charge when it gains or acquires an electron.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.