Question

The atoms of which of the following pair of elements are most likely to exist in free state? (a)hydrogen,helium
(b)argon,carbon
(c)neon,nitrogen
(d)helium,neon

Answer 1

Answer:

In these given pairs, the noble gas pair is "helium and neon".

Explanation:

• The noble gases form the 18th row in the periodic table which includes helium, neon, argon, Xeon, radon etc.
• Among these pair hydrogen, helium, argon, carbon, neon, nitrogen, constitute the noble metals thereby these elements are not meant for bonding with other elements.
• Hence their existence is achieved in their free state. In these pair the noble gas pair is helium and neon and hence this is the answer.

Answer 2

Explanation:

answer is helium and neon