Question

Al crystalles in cubic unit cell and edge length 405 pico and density = 2.7 gm/ cc predict the crystal​

Answer 1

Answer:

Theoretical density of crystal, ρ=

N

o

a

3

nM

g/cm

3

Given, ρ=2.70 g/cm

3

, a=405×10

−10

cm, M=26

⇒n=

M

ρN

o

×a

3

=

26

2.70×6.022×10

23

×(405)

3

×10

−30

⇒n=4

So, it is a face centered cubic cell.

Hence, Option "B" is the correct answer.

I just tried ..