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The unit cell of a substance has cations...

The unit cell of a substance has cations `A^(+)` at the corners of the unit cell and anions `B^(-)` in the centre. What is the simplest formula of the substance ?

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AB.
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A compound contains two types of atoms - X and Y. It crystallises in a cubic lattice with atom X at the corners of the unit cell and atoms Y at the body centres. What is the simplest possible formula of this compound ?

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Knowledge Check

  • A compound contains two types of atoms X and Y. it crystallises in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is

    A
    `X_(8)Y`
    B
    `X_(2)Y`
    C
    XY
    D
    `XY_(8)`

  • A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atom X at the corners of the unit cell and atom Y at the body centres. The simplest possible formula of this compound is

    A
    `X_()3)Y`
    B
    `X_(2)Y`
    C
    XY
    D
    `XY_(6)`

  • 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 the face centres. One of the A atoms is missing from one corner in the unit cell. The simplest formula of the compound is

    A
    `A_7B_3`
    B
    `AB_3`
    C
    `A_7B_(24)`
    D
    `A_(7//8)B_5`

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