Question

the electronic configuration of an element is 2 ,8 ,6 to which group and period does this element belong .state its valency and justify the answer in each case

Answer 1

it's valency is 2 it will take two electrons to fill its optate
16th group
3 period because number of shells is 3

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.