1.

Sodium metal crystallizes in bee structure with the edge length of the unit cell 4.3 xx10^(-) cm. Caleulate the radius of sodium atom.

Answer»

SOLUTION :`"Edge LENGTH of the UNIT cell (a)"=4.3xx10^(-8)CM`
`"Radius of sodium atom (r )"=?`
`"for bcc structure, r"=(sqrt3)/(4)a`
`=(sqrt3)/(4)(4.3xx10^(-8)cm)`
`=(1.732xx4.3xx10^(-8))/(4)`
`=(7.4476)/(4)xx10^(-8)cm`
`=1.86xx10^(-8)cm=1.86Å`


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