Question

Copper crystallizes as face centered cubic lattice, with edge length of unit cell 361 pm. Calculate the radius of copper atom.

Options

• 108.6 pm

• 127.6 pm

• 157.6 pm

• 181.6 pm

Answer 1

127.6 pm

Explanation:

For FCC crystal, r = `sqrt2/4 "a" = sqrt2/4 xx 361` = 127.6 pm