Question

what is symbal and valency for. Aluminium ion​

Answer 1

Valency of aluminium:

The atomic number of Aluminium is 13 ,so its electronic configuration is 2, 8, 3 .It has 3 electrons in outermost shell . The aluminium atom can lose these 3 electrons to form the aluminium ion ,Al³+, having an inert gas electron configuration of 2,8.

Since the valency of aluminium is 3