Question

The electronic configuration of an element is 2,8,6 to which group and period of the modern periodic table does X belong. State it's balancy and justify your answer in each case

Answer 1

Here you go....
The element is SULPHUR.
IT'S VALENCY IS 2.
why? because it needs 2 more electrons to get its octet completed.
The element is suphur because its configuration adds to 16.and the element with atomic no. is SUPHUR.
group no. 16 and period no.3

Answer 2

it's valancy is 2 since it needs only 2 electrons to complete its octet
it belongs to group 16 or 6A because it has 6 valence electrons
it belongs to period 2 because it has valancy 2