Question

1) Sodium metal crystallises in a body centred cubic lattice with a unit cell
edge of 4.29 A The radius of sodium atom is approximately​

Answer 1

Answer:

Solution :

In a body centered cubic lattice, atoms touch along the body diagonal of the cube . Thus

4r=3–√a

or r=3–√4a

=(3–√4)(4.29A˙)=1.86A