Question

Atomicity of chlorine and argon is.
A. Diatomic and monatomic.
B. Monoatomic and diatomic.
C. Monatomic and monoatomic.
D. Diatomic and diatomic.

Answer 1

Hint: We can define atomicity as the total number of atoms that form a molecule.
For instance, each molecule of oxygen has two oxygen atoms so the atomicity of oxygen is 2 and each molecule of nitrogen has two nitrogen atoms so the atomicity of nitrogen is 2.

Complete step by step answer: As we know, atomicity is defined as the total number of atoms that form a molecule. Molecules of the different elements have a different number of atoms. Now we discuss about the classification of atomicity into different groups as,
- Monoatomic molecules- The molecule which is formed by one atom is called a monatomic molecule. For instance, all noble gases are monatomic.
We know argon belongs to a noble gas. Thus argon is a monatomic molecule.
- Diatomic molecules- The molecule which is formed by two atoms is called a diatomic molecule. For instance, Nitrogen, oxygen, chlorine are diatomic molecules.
Therefore, option A is correct. Chlorine is a diatomic molecule and argon is a monatomic molecule.
- Triatomic molecules- The molecule which is formed by three atoms is called a triatomic molecule. For instance, Ozone is a triatomic molecule.
- Polyatomic molecules- The molecule which is formed by more than four atoms is called a polyatomic molecule. For instance, octa sulfur is a polyatomic molecule.

So, the correct answer is “Option A”.

Note: Now we can discuss about atomicity as,
The term atomicity is sometimes used to represent the valency.
Some elements such as carbon do not have very simple structures; they have indefinite numbers of atoms that are bonded together in such cases the atomicity cannot be calculated.