1.

A cubic solid is made of two elements P and Q. Atoms Q are at the corners of the cube and P at the body centre. What is the formula of the compound?

Answer»

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Solution :As ATOMS P are present at the body centre, therefore, number of atoms of P in the unit cell = 1.
As atoms Q are present at the 8 corners of the cube, therefore, number of atoms of Q in the unit cell = `1/8 xx 8` = 1
Ratio of atoms P:Q=1:1
HENCE, the FORMULA of the compound is PQ.


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