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

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

Grade:8

1 Answers

Gaurav
askIITians Faculty 164 Points
6 years ago
Hello Student
It is given that the</span> <span> atoms of Q are present atthe corners of the cube.
Therefore,number of atoms of Q in one unit cell = 8 x 1/8 = 1
is also given that theatoms of P arepresent at the body-centre.
Therefore,number of atoms of P in one unit cell = 1
Thismeans that the ratio of the number of Patoms to the number of Q atoms, P:Q = 1:1
Hence, theformula of the compound is PQ

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