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Potassium metal has body-centred cubic c...

Potassium metal has body-centred cubic crystal. The edge length of the unit cell of the crystal is 0.542 nm. Determine the radius of K atom and the volume occupied by the atoms in the unit cell.

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`r=sqrt3/4a=sqrt3/4xx0.542=0.234nm`. Volume occupied by the atoms in the unit cell = total no. of atoms in unit cell `xx` volume of each atom = `2xx4/3pi(0.234xx10^(-9))^(3)m^(3)`
`=1.072xx10^(-28)m^(3)`
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