Question

an element crystallizes in body centred cubic lattice it has density of 10 gram centimetre cube at room temperature calculate the atom radius of the atom of an element also calculate the atomic volume assuming atom to be our hearts hair

Answer 1

Answer:

Formula units per unit cell for BCC (Z)=2

Edge of lattice (a)=3×10

−8

cm

Density of element (d)=6.89g/cm

3

N

A

=6.022×10

23

Molar mass of element (M)=?

As we know that,

M=

Z

d×N

A

×a

3

⇒M=

2

6.89×6.022×10

23

×(3×10

−8

)

3

≈56g

Hence the molar mass of element is 56g.