JEE Advanced: Alkali Metals
Group 1 Reactions & Trends for chemca.in
Diagonal Relationship
Li & Mg: Similar ionic sizes (Li+ = 76pm, Mg2+ = 72pm) lead to similar properties: both form nitrides, decompose carbonates easily, and have covalent halides.
Solubility Trends
Carbonates: Solubility increases down the group. Li2CO3 is the least soluble.
Halides: LiF is low solubility (high lattice energy); CsI is low solubility (low hydration energy).
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