Question

If an atom of an element contains 3 atoms in the outermost shell , then find the 1) electronic configuration of the atom 2) Atomic no. 3) No. of protons 4) Valency 5) Name of element 6) Nature - metal or non metal

Answer 1

1)2,8,3

2)13

3)13

4)3-

5)aluminium

6)Metal