Same chapter3 marksDifficulty: Medium
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3 marksDifficulty: Medium
Why does boron show anomalous behaviour compared with the other group 13 elements?
Original Khojo Papers practice question — not from a past board paper.
Answer
Boron is exceptionally small, has a high ionisation enthalpy and no d orbitals, so it never forms a simple B3+ ion and its compounds are covalent. It is also the only non-metal of the group, and it forms electron-deficient compounds such as diborane.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Its maximum covalency is four, unlike the heavier members.
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