Question

(a) What do you understand by the term noble gas?

(b) Name four noble gases along with their symbols.

(c) Why are noble gases sometimes called rare gases?

Answer 1

(a) Noble gases are those elements that have filled valence shells, due to which these gases are inert towards most chemical reactions.

(b) Some noble gases are as follows -

Helium	He
Neon	Ne
Argon	Ar
Radon	Rn
Xenon	Xe

(c) Noble gases or inert gases are sometimes called rare gases because they are present in fewer quantities in the air.