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Sodium metal crystallizes in a body cent...

Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately :

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In bcc arrangement of atoms: 4 r = `sqrt(3)`a atoms on body diagonal remain in contact.
`rArr " " r = (sqrt(3)a)/(4) = (sqrt(3) xx 4.29)/(4) = 1.86` Å
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Knowledge Check

  • The vacant space in body centred cubic lattice unit cell is:

    A
    0.32
    B
    0.26
    C
    0.48
    D
    0.68

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