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Introduction to d and f Block Elements

" Li2O is mo...

Question

" $L i_{2} O$ is more stable than $L i_{2} C O_{3}$ ."

State whether the above statement is true or false.

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Solution

" $L i_{2} O$ is more stable than $L i_{2} C O_{3}$ ."
Both $L i^{+}$ ion and $O^{2 -}$ ion have small ionic radii and high charge densities.
Hence, these small ions pack together forming a very stable lattice of $L i_{2} O$
On the other hand, in $L i_{2} C O_{3}$ , the carbonate ion have larger size. Hence, the lattice formed is less stable due to inefficient packing.

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