A metal forms cubic crystals. The mass of one unit cell of it is M/NA gram, where M is the atomic mass of the
metal and NA is the Avogadro no. What is the type of cubic unit cell possessed by the metal?
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Atomic mass(M) of an element in grams is the mass of NA atoms of that element.So mass of one atom is equal to M/NA grams. Since the given mass of the unit cell is also equal to M/NA grams, it must has exactly one atom in it. So the type of unit cell is a simple cubic cell.
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