Question

19. An element A crystallises in fcc structure. 200 g of
this element has 4.12 x 1024 atoms. The density of
A is 7.2 g cm3 Calculate the edge length of the
unit cell.
(1) 26.97 x 10-24 cm
(2) 299.9 pm
(3) 5 x 10-12 cm
(4) 2.99 cm
​

Answer 1

Answer:

This answer is (1) 26.97× 10-24 cm

Answer 2

Answer:

2).299.9pm

Explanation:

use

$d = \frac{zm}{ {a}^{3} na }$