Question

The electronic configured of an element ' X' is 2,8,6 .To which group and period table does ' X' belong . State it valency and justify your ans in each case.

Answer 1

Group:6 no of electron in the outermost cell

Period:3 no of cell

Valency:2 need two electrons two get stable

Answer 2

Answer:

1 . Since ‘X’ has three energy shells and period number of an element is equal to the number  of energy shells, X belongs to 3rd period.

2 . X has 6 valence electrons it belongs to group 16.

3.  Valency will be 2. To acquire noble gas configuration it will gain 2 electrons.