Both lithium and magnesium displace several similar propertiess due to the diagonal relationship, however, the one which is incorrect, is-

Options

A. both form nitrides
B. nitrates of both Li and Mg yiled `NO_(2) and O_(2)` on heating
C. both form soluble carbonates
D. both form soluble bicarbonates

Answer

C

Explanation

Despite having diagonal relationship, Li and Mg differ in carbonate satls. Magnesium forms basic carbonate `[3MgCO_(3),Mg(OH)_(2),2H_(2)O]` but lithium like other alkli metals form normal carbonate `[Li_(2)CO_(3)]` salts. Hence, `O^(-2),F^() and Mg^(2+)` are isoelectronic species.