A closed packed structure of uniform spheres has the cell edge `=0.8mm`. Calculate the radius of molecule if it has `:` `(a)` simple cubic lattice, `(b)` `b.c.c.` lattice, `(c)` `f.c.c.` lattice.
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The correct Answer is:
`(a)` 0.4mm, `(b)` 0.3464 mm, `(c)` 0.2828mm;
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