Question

Alumimnium crystalline in cubic close packed strutcutre with unit cell edge length 352.6pm what is the radius of al atom ? how many unit cell are there in 1.00 cm cube of aluminium ?

Answer 1

Explanation:

Number of unit cells in 1 cm^3 = 1 / 4.42 x 10^-23 = 2.26 x 10^22 unit cells.

Answer 2

Answer:

Given:−

Edge = 353.5 F

Unit ce = 1.00 cm

ToFind:−

Radius

Total cell

Solution

As we know that

a = 2√2r

353.5 = 2√2r

r = 353.5/2 × 1.414

r = 125 pm

Now,

Unit cells = 1/a³

1/(353.5 × 10^-10)

Now,

Unit cell = 2.26 × 10²²