A compound `M_(p)X_(q)` has cubic close packing `(ccp)` arrangement of `X`. Its unit cell structure is shown below. The empirical formula of the compound is

Options

A. MX
B. `MX_2`
C. `M_2X`
D. `M_5X_14`

Answer

B

Explanation

No. of M atoms `{:(=4xx1/4," " 1,=2),("(edge centres)","(body-centred)",):}`
No. of X atoms `{:(=8xx1/8,6xx1/2,=4),("(corners)","(face-centres)",):}`
`therefore` Unit formula =`M_2X_4` and empirical formula =`MX_2`