An element has a bcc structure with cell edge of 288 pm . The density of element is 7.2 ~g ~cm ⁻³ . What is the atomic mass of an element?

Step-by-step solution

(D) array l a =288 pm =2.88 10⁻⁸ ~cm a ³= (2.88 10⁻⁸ )³ ~cm ³=2.39 10⁻²³ ~cm ³ =7.2 ~g ~cm ⁻³, n =2( for bcc cell ) M = a ³ N _ A n = 7.2 2.39 10⁻²³ 6.022 10²³ 2 =51.81 ~g array