Na and Mg crystallise in b.c.c and f.c.c type crystals respectively , then the number of atoms of Na and Mg present in the unit cell of their respectively crystal is
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No. of sodium in b.c.c = 1×1+1= 2 atoms
No. of Mg in f.c.c = 1/2×6+1=3+1= 4 atoms
No. of Mg in f.c.c = 1/2×6+1=3+1= 4 atoms
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