Question

The atomic no. Of three elements A,B and C are 9 ,10 and 13 respectively which of them will be a cation? a) electric configuration of A-2,7 (b) B-2,8 (c)C-2,8,3

Answer 1

Element C is Aluminum 2,8,3.

Element C will be a Cation as it would require a large amount of energy to gain 7 electrons to complete it's octet.So it will lose three electrons and will become AL³+.

So optionC is correct.