Question

Pls some one help 1 mark question

Answer 1

Answer:

See below

Explanation:

Helium belongs to group VIII of the periodic table "Noble gases". It has only 1 electronic shell and that too contains 2 electrons according to the accommodation of the shell. Hence, it's electronic shell is complete. This is the reason, Helium is chemically unreactive.

$\rule[225]{225}{2}$

Hope this helped!

~AH1807