Question

Molecular mass of nitrogen is 28. Its atomic mass is 14. Find the atomicity of nitrogen.

Answer 1

Hint: In this question we need to find out the atomicity of nitrogen elements. Then if we define the atomicity; it is the number of atoms present in a molecule. It can be understood with the help of an example i.e. oxygen O$_2$, here the total number of oxygen atoms is 2; so the atomicity of oxygen atom is 2.

Complete step by step answer:
Now, as mentioned we have to calculate the atomicity.
In the question, we are given with the molecular mass of nitrogen, and the atomic mass of nitrogen.
So, we can say that these both factors are relatable with the atomicity of an atom, or an element.
We defined atomicity as the total number of atoms in a molecule; thus it can be said that it tells us whether the molecule is monatomic, diatomic, triatomic, etc.
Now, we will see the relation of atomicity with the molecular mass, and the atomic mass. It can be written as:
Atomicity = molecular mass/ atomic mass
So, we can say atomicity is calculated by dividing the molecular mass of a molecule to the atomic mass of an element.
Here, Atomicity = 28/14
Thus, we get atomicity = 2.
In the last, we can conclude that the atomicity of nitrogen is 2.

Note: Don’t get confused about why we used the formula to determine the atomicity. Because it provides the accurate result to us. If we would have explained like the oxygen, then we must know the chemical formula of nitrogen, and the example is considered to know about the term atomicity. So, we calculated the atomicity on the basis of given data.