An element has a body centred cubic structure with a cell edge of 288 pm.The density of the element is $7.2gcm^{-3}$.calculate the number of atoms present in 280g of the element.

Question

$\begin{array}{1 1}2.418\times 10^{24}\\4.418\times 10^{24}\\6.418\times 10^{24}\\1.418\times 10^{24}\end{array} $