what is the total number of elements of symmetry in a cubic crystal? how to find out for any other crystal?

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Q. The elements of symmetry in a crystal are:

A metal element ‘M’ of radius 50 nm is crystallized in FCC format cubical crystal such that the face of unit cells align with the face of cubical crystal. If the total number of metal atoms of ‘M’ at the face of the cubical crystal is $6 \times 10^{30}$ , then the area of one face of the cubical crystal is $A \times 10^{16} m^{2}$ , the value of ‘A’ is:___

Metal element 'M' of radius 50nm is crystallized in FCC format and made into cubical crystals such that face of unit cells are aligned with face of cubical crystal.If total number of metal atoms of 'M' at face of cubical crystal is 6 $\times$ $10^{30}$ , then area of one face of cubical crystal is A $\times$ $10^{16}$ $m^{2}$ , the value of 'A' is:

Q. Metal M of radius

50

nm is crystallized in fcc type and made cubical crystal such that the face of unit cells is aligned with the face of cubical crystal. If the total number of metal atoms of M at all faces of cubical crystal is

6 \times 10^{30}

, then the area of one face of cubical crystal is

A \times 10^{16}

^{2}

. Find the value of A.

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