Atomicity of phosphorus is:

The formula of Phosphorus is P_4. So the atomicity of phosphorus is 4.

What is atomicity?

The number of atoms presents in a single molecule is termed its atomicity. It can be classified into three types.

• The molecules of many elements are composed of only a single atom of that element. They are termed monatomic. For example, Ar (Argon), He(Helium). So their atomicity is one.
• The molecules of many elements are composed of two atoms of that element. For example, oxygen can never exist independently and exist as an O₂ molecule known as diatomic, So its atomicity is 2.
• The molecules of many elements are composed of three atoms of that element. They are termed triatomic, For example, O₃, CO₂. So their atomicity is 3.
• The molecules of many elements are composed of four atoms of that element. They are termed as tetra atomic For example, P₄, SO₃. So their atomicity is 4.