Question

How many atoms in a diamond.

Answer 1

Kind of depends on the size of the diamond, wouldn't you say?

Answer 2

If a diamond is pure carbon, then 1 mole of carbon = 12 gms carbon = 12 grams diamond = 6.02 x 10^23 atoms of carbon => (6.02 x 10^23 atoms / 12 gms) = (5.02 x 10^22 atoms / gm diamond)x(0.20gm/carat) = 2.51 x 10^23 atoms of diamond-carbon/carat