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Question
An ionic solid A⊕B⊝ crystallizes as a fcc structure. If the edge length of cell is 508 pm and the radius of anion is 144 pm, the radius (in pm) of cation is :
An ionic solid A⊕B⊝ crystallizes as a fcc structure. If the edge length of cell is 508 pm and the radius of anion is 144 pm, the radius (in pm) of cation is :
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Solution
The correct option is A 110
In an FCC lattice,
a=2(r++r−)
508=2(r++144)
r+=110 pm
Hence, the correct option is A
In an FCC lattice,
a=2(r++r−)
508=2(r++144)
r+=110 pm
Hence, the correct option is A
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