An element having bcc geometry has atomic mass 50 . \( \mathrm{P} \...

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An element having bcc geometry has atomic mass 50 .
\( \mathrm{P} \)
Calculate the density of the unit cell, if its edge length
W
is \( 290 \mathrm{pm} \).
(A) \( 6.81 \mathrm{~g} \mathrm{~cm}^{-3} \)
(B) \( 7.81 \mathrm{~g} \mathrm{~cm}^{-3} \)
(C) \( 5.81 \mathrm{~g} \mathrm{~cm}^{-3} \)
(D) \( 4.81 \mathrm{~g} \mathrm{~cm}^{-3} \)
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