Lithium shows a diagonal relationship with
- A. sodium
- B. magnesium
- C. beryllium
- D. aluminium
Explanation
Lithium resembles magnesium because their ions have similar size to charge ratios, so both form nitrides directly with nitrogen, both give carbonates that decompose on heating and both have oxides that are less soluble than those of their own group. Beryllium is diagonally related to aluminium in the same way. Diagonal relationships are strongest in the second and third periods.
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