Question

What is the atomicity of Kr,Ar and Ne?

Answer 1

Noble gases (helium, neon, argon, krypton, etc.) have one atom each in their molecules such as He, Ne, Ar and Kr. So, the atomicityof noble gases is 1

Answer 2

Answer: The atomicity of all the given elements is 1.

Explanation:

Atomicity is defined as the number of atoms present in a molecule of an element. For Example: For $P_4$, the atomicity is 4 and for $S_8$, the atomicity is 8.

The given elements: Krypton, Argon and Neon are the elements which belong to Group 18 in the periodic table. These are known as Noble Gases.

These elements are monotaomic elements and hence, the valency of these elements will be 1.