Question

An element crystallizes in bcc
as well as fcc having edges 300 and 400 pm respectively. the ratio of there densities ​

Answer 1

Answer:

As we know,

Density (ρ)=

a

3

×N

A

Z

eff

×Mw

For fcc, Z

eff

=4

ρ

fcc

=

(3.5×10

−8

)

3

×N

A

4×Mw

For bcc, Z

eff

=2

ρ

fcc

=

(3×10

−8

)

3

×N

A

2×Mw

ρ

bcc

ρ

fcc

=

(3.5)

3

×2

4×(3)

3

=1.26