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Question

The edge length of a unit cell of a metal whose molecular weight is 75 g/mol is 5 angstrom. This crystallises in a cubic lattice. If the density is 2 g/cc, find the radius of the metal atom. Give the answer in pm.

NA=6×1023


A

457.8 pm

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B

216.5 pm

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C

789.5 pm

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D

257.8 pm

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