Question

A metallic element has a cubic lattice. Each edge of the unit cell is 2 Å. The density of the metal is 2.5 g cm${}^{-3}$. The unit cells in 200 g of metal are:

• A. $1\times {10}^{24}$
• B. $1\times {10}^{20}$
• C. $1\times {10}^{22}$
• D. $1\times {10}^{25}$

Answer 1

The correct option is D $1\times {10}^{25}$

Hence,option D is correct.