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In crystalline solids, atoms or molecule...

In crystalline solids, atoms or molecules are arranged in a regular and long range order fashion in a three dimensional pattern. Q. An alloy of Cu and gold crystallises in cubic lattie in which the gold atoms occupy the lattice points at the corners of cube and copper atoms occupy the centre of each face. the formula of this compound is:

A

`AuCu_(3)`

B

`AuCu`

C

`AuCu_(2)`

D

`CuAu_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Au atoms/unit cell `(1)/(8)xx8=1,` Cu atoms/unit cell`(1)/(2)xx6=3`
`therefore`empirical formula is `AuCu_(3)`.
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