If the aluminium salt of an anion is Al2X3, what is the valency of X and what will be the - Science - Atoms and Molecules

Question

If the aluminium salt of an anion is Al2X3, what is the valency
of X and what will be the formula of magnesium salt of X?

Anuradha Puri · Accepted Answer

The valency of a metal in the formula of ionic salts is written at
the subscript of non-metal and vice-versa So the, valency of X in
Al2 X3 is 2
The valency of Magnesium is 2 So the formula of magnesium salt will
be MgX

If the aluminium salt of an anion is Al2X3, what is the valency of X and what will be the formula of magnesium salt of X?