Question

The element having lowest first ionisation potential among Sr, As,S and F is
Ans:'Sr'. But how?​

Answer 1

Answer:

Yes, The answer is Sr(Strontium)

Explanation:

Ionisation potential is basically the energy required for an atom of an element to release its valence electrons.

We can se,

Sr(Strontium)-Metal with valency '+2'

As(Arsenic)-Metalloid with valency '–3'

S(Sulphur)-Non metal with valency '–2'

F(Fluorine)-Non Metal with valency '–1'

Strontium being electropositive is most likely to loose Electrons without losing much of its energy. So, Its ionisation potential is the least among the other 3