Unit cell of an element has edge length of 5 Å with density 4 ~g ~cm ⁻³ , if its atomic mass is 149 , identify the crystal structure.

Step-by-step solution

aligned & Density ( )= n M a^3 N_A & n= N_A a^3 M & = 4 gcm ⁻³ 6.022 10²³ ~mol ⁻¹ (5 10⁻⁸ ~cm )^3 149 ~g ~mol ⁻¹ & 301.1 149 n =2.02 2 aligned Thus, it is a bcc crystal structure.