Question

define atomicity.......... i want answer in more that 40 words.. otherwise i will report answer.

Answer 1

Atomicity is the total number of atoms present in one molecule of an element.
Consider the molecule of oxygen O2.

O2 contains 2 atoms....
It is a diatomic element or you can say diatomic gas

Let's consider another example.
The molecule of phosphorous,P4 has 4 atoms. So it's atomicity is 4
Phosphorous is tetra-atomic element

Answer 2

Atomicity is the total number of atoms present in one molecules of an element .
such as molecules of hydrogen H2 .
H2 contains 2 atoms.
Another example sulphur (S8) has 8
atoms.