Ncert Exercises & Solutions

In a compound, nitrogen atoms (N) make cubic close packed lattic and metal atoms (M) occupy one-third of the tetrahedral voids present. Determine the formula of the compound formed by M and N?

Let the number of N atoms in ccp is x

∴

Number of tetrahedral voids = 2x

∴

Numberof M atoms =

\frac{1}{3}

x 2x

\frac{Number of N atoms}{Number of M atoms} = \frac{3 x}{2 x} = \frac{3}{2}

So, the formula of the compound is M₂N₃

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