Question

In bcc unit cell edge length is 100 pm what will be the raidius of atom

Answer 1

Answer:

n FCC: The atoms at the face diagonals touch each. If a is the edge length of cube and r is the radius of the atom.

So,  

2

​  

a=4r

⇒a=2  

2

​  

r

In bcc: The atoms at the body diagonal touch each other.

So,  

3

​  

a=4r

⇒a=  

3

​  

 

4

​  

r

In simple cubic: The atoms at the corners touch each other.

So, a=2r