A compound is formed by two elements M and N Chapter 1: the Solid State Chemistry Class 12 solutions are avalable at ourwebsite to help the students. Question 1.16: A compound is formed by two elements M and N. The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound? is solved by our expert teachers. You can get ncert solutions and notes for class 12 chapter 1 absolutely free. NCERT Solutions for class 12 Chemistry Chapter 1: the Solid State will definitely help in improving your marks in CBSE Board examinations.

Question 1.16: A compound is formed by two elements M and N. The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound?

Answer
Let number of atoms of the element N = n
Number of tetrahedral voids = 2 × number of atoms in close packaging
Therefore
Number of tetrahedral voids = 2n
It is given that the atoms of element M occupy 1/3rd of tetrahedral voids.
So that the number of atoms of M is = (1/3) × 2n
=(2/3)n
Ratio of the number of atoms of M and N

$M:N=/frac{2n}{3}:n$

Multiply by 3 and divide by n we get
M:N = 2:3
Hence , the formula of the compound is M₂N₃.