1.

In a face centred cubic arrangement of A and B atoms, A atoms are at the corners of the unit cell and B atoms at theface centres. One of the A atom is missing from one corner in the unit cell. The simplest formula of the compound is

Answer»

`A_(7)B_(3)`
`AB_(3)`
`A_(7)B_(3)`
`A_(7//8)B_(3)`

Solution :If ONE atom (A) is missing from one corner, no of ATOMS A in unit CEL `=7xx1/8=7/8`
no. of atoms B in unit cell `=6xx1/2=3`
`A:B=7/8j:3`.so, simplest FORMULA is `A_(7)B_(24)`.


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