Question

Compounds of beryllium are much more covalent than other group
2 elements. Give reason.​

Answer 1

Answer:

Anomalous nature of beryllium

The high charge/size ratio of Be2+ leads tocompounds that are more covalent and complexes that are more stable than those of the remaining Group II cations. Many of thecompounds have anomalously low melting points, enthalpies of formation, and are moresoluble in organic solvent

Answer 2

Compounds of beryllium are much more covalent than other group 2 elements because of the high ionization energy of beryllium.

• Ioniztion energy decreases as one moves down the group of a periodic table as the effective nuclear charge almost remains constant while the atomic size increases significantly due to addition of extra shells.
• Beryllium has a very high ionization energy, so formation of the divalent ion by the removal of electrons is difficult.
• Hence beryllium form more covalent compounds.