Q.
Lithium selenide can be described as a closest-packed array of selenide ions with lithium ions in all of the tetrahedral holes. Formula of lithium selenide is
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a
Li2Se
b
LiSe
c
LiSe2
d
Li3Se
answer is A.
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Detailed Solution
Selenide ions occupy ccp =4Since there are 4 lattice points tetrahedral voids are 8.Lithium ions occuoy all tetrahedral voids =8Ratio of Li+ and Se-2 8 : 4 Thus, its formula will be Li2Se.
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