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Potassium crystallizes in a body centred...

Potassium crystallizes in a body centred cubic unit cell. The mass of one unit cell is 

A

`1.29xx10^(-23)gm`

B

`1.295xx10^(-22)gm`

C

`6.2xx10^(-23)gm`

D

`1.29xx10^(-24)gm`

Text Solution

Verified by Experts

The correct Answer is:
B
BCC : z = 2 , i.e. 2 atoms per unit cell
2 .K. atoms `rarr` 1 unit cell , `.3xx39gm larr 6xx10^(23)" unit cell"`
`? larr "1 unit cell"=13xx10^(-23)=1.3xx10^(-22)gm`
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AAKASH SERIES-SOLID STATE-PRACTICE SHEET - 4
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