Lithium metal crystallizes in a body-centered cubic crystal. If the length of the side of the unit cell of lithium is 351pm, the atomic radius of lithium will be:
A
151.8pm
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B
75.5pm
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C
300.5pm
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D
240.8pm
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Solution
The correct option is A151.8pm Since Li crystallizes in body-centered cubic crystal,
atomic radius r=√3a4
where, a = Edge Length r=√3×3514=151.8pm