By X-ray studies, the packing of 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 identical . The density of gold is found to be 19.4 g cm^(-3) and its atomic mass is 197 a.m.u. The approximate number of unit cells present in 1 g of gold is

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

1.	By X-ray studies, the packing of 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 identical . The density of gold is found to be 19.4 g cm^(-3) and its atomic mass is 197 a.m.u. The approximate number of unit cells present in 1 g of gold is
Answer» `3.06xx10^21` `1.53xx10^21` `3.82xx10^20` `7.64xx10^20` ANSWER :D