If a gas has a volume of 1.1 L when there are 0.05 mol present, what will be the volume if the new volume of the gas if you use 0.600 mol of gas?

Explanation:

The valence number represents the number of electrons in the outermost shell of the atom. Interestingly, in a group 1 -8 periodic tale, the number represents the valence electrons.

Thus means that group 3 electrons have a valency of 3; that is all group 3 elements have 3 electrons in their outermost shell.

Metals easily lose electrons rather than gain electrons while non metals gain electrons.

In the periodic table; groups 1, 2, 3 represents metals and from group 4 upwards we have non metals.

Going through the options now, the correct option is;

3:if the valence electron number is either 1,2 or 3 then it is a Metal and if the valence electron number is either 4,5 or 6 then it is a Non Metal

Group  7 elements ( Valency of 7) are also non metals.