Nickel has a face-centered cubic unit cell. The density of nickel is 6.84 grams per centimeter cubed.?

Question

What is the atomic radius, in angstroms, of nickel?

Atomic weight of Nickel = 58.71 g/mol

Answer 1

Each unit cell has 4 atoms

So, let atomic radius be a, so unit cell is of side (4a/1.414) = 2.828 a

So, density = (4*58.71)/(NA*l^3) where l is the side of the unit cell.