Only those atoms which four covalent bonds produce a repetitive three dimesional structure using only covalent bonds., e.g. , diamond structure.The latter is based on a FCC lattice where lattice points are occupied by carbon atoms.Every atom in this structure is surrounded tetrahedrally by four others.Germanium, silicon and grey tin also crystallize in the same way as diamond. (Given :N_A=6xx10^(23) sin 54^@44'=0.8164) Total number of diamond unit coils in 1.2 gm of diamond sample is

Only those atoms which four covalent bonds produce a repetitive three

1.	Only those atoms which four covalent bonds produce a repetitive three dimesional structure using only covalent bonds., e.g. , diamond structure.The latter is based on a FCC lattice where lattice points are occupied by carbon atoms.Every atom in this structure is surrounded tetrahedrally by four others.Germanium, silicon and grey tin also crystallize in the same way as diamond. (Given :N_A=6xx10^(23) sin 54^@44'=0.8164) Total number of diamond unit coils in 1.2 gm of diamond sample is
Answer» `6.0xx10^21` `6.0xx10^22` `7.5xx10^21` `5.0xx10^22` Solution :TOTAL number of UNIT cells`=(1.2xxN_A)/(12xx8)=7.5xx10^(21)`