By X-ray studies, the packing atoms, in a crystal of gold is found to be in layers such that starting from any layer, every fourth layer is found to be exactly idenctical. The density of gold is found to be19.4 g cm^(-3) and its atomic mass is 197 a.m.u. The coordination number of gold atom in the crystal is

By X-ray studies, the packing atoms, in a crystal of gold is found to

1.	By X-ray studies, the packing atoms, in a crystal of gold is found to be in layers such that starting from any layer, every fourth layer is found to be exactly idenctical. The density of gold is found to be19.4 g cm^(-3) and its atomic mass is 197 a.m.u. The coordination number of gold atom in the crystal is
Answer» 4 6 8 12 Solution :The arrangement of LAYERS is ABC ABC …..TYPE, i.e, it has cubic CLOSE packing arrangement. Hence , the coordination number is 12.