Question

Which of the following gases has the least tendency to form compounds

Answer 1

Answer:

Helium

Explanation:

Helium has least tendency to form compound.

Answer 2

Answer:

Helium, Neon, Argon, krypton.

All noble gases have the least tendency to form compounds.

Explanation:

All the noble gases which are placed in the 18th group in the periodic table are the least reactive and have less tendency to form compounds.

This is because they have completed octet configurations in ground state.

except helium all the other noble gases have their valence she'll filled with all the eight electrons thus, a complete octet which provides it stability and non-reactive nature. whereas helium has only two electrons in its outermost layer (as it has no p sub-level)