Copper metal crystallizes with a face centred cubic (fcc) lattice .It has a coordination number of

Options

(a) 4
(b) 1
(c) 12
(d) 2

Correct Answer:

12

Explanation:

Every particle in a crystal is surrounded by a definite number of other particles as the nearest neighbours. This number of nearest neighbours around the given particle is called the coordination number.The face centered cubic lattice has 14 lattice points and 12 coordination number.