An element A crystallises in fcc structure. 200 g of this element has4.12 xx 10^(24) atoms. The density of A is7.2 " g cm" ^(-3) . Calculate the edge length of the unit cell.

An element A crystallises in fcc structure. 200 g of this element has4

1.	An element A crystallises in fcc structure. 200 g of this element has4.12 xx 10^(24) atoms. The density of A is7.2 " g cm" ^(-3) . Calculate the edge length of the unit cell.
Answer» <P> Solution :`p = ( Z xxm)/(a^(3)xx 10^(-30)) or a = (( Z xxm)/(p xx 10^(-30)))^(1//3) = ( 4xx200 //(4.12 xx10^(24)))/(7.2 xx 10^(-30))"pm" = 299.9 "pm"`