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Why does lithium form covalent bond unlike other alkali which forms ionic
bond?
Why does lithium form covalent bond unlike other alkali which forms ionic
bond?
Dear Student,
Lithium has small size and has high charge density. Now, as per Fajan's rule, smaller the cation and higher the charge, greater will be the polarising power. As a result, Li has high polarising power. So, it polarises the anions which consequncy leads to the formation of covalent bond as greater the polarising power, greater will be covalent character.
Hence, Li forms covalent compounds.
Lithium has small size and has high charge density. Now, as per Fajan's rule, smaller the cation and higher the charge, greater will be the polarising power. As a result, Li has high polarising power. So, it polarises the anions which consequncy leads to the formation of covalent bond as greater the polarising power, greater will be covalent character.
Hence, Li forms covalent compounds.