Question

electronic configuration of element x is 2,8,6. To which group and period does it belongs state uts valency and justify your answer in each case​

Answer 1

Answer:

Period number = 3

Group number = 16

Explanation:

The atomic number of the given element is (2+8+6) = 16

So, the element is sulphur.

Since, number of shells = 3

that means, period = 3

To Find group:

Write electronic configuration as :1s^2,2s^2,2p^6,3s^2,3p^4

Since .last electron is in entering p-subshell, we have element in p-block

For group of element in p-block:

∴ Group number = 10+ Valence e− in s subshell + Valence e− in p subshell

Group Number = 10+2+4 = 16