Question

the electronic configuration of an element X is 2 8 6 to which group and period of modern periodic table does X belong state its valency and justify your answer in each case

Answer 1

The element has 4 shells which means that it actually belongs under the 4th period.

The element also consists of only 2 valence electrons meaning that it actually belongs in the 2nd group.

As far as valency goes,the element has a valency of 2 because it can lose 2 of its electrons which can let it obtain the configuration of noble gas.

Answer 2

The group is 16 and period is 3

It is in right side that's why it's shells are 4 .

I HOPE this answer will help U