NEETChemistryp Block Elements (Group 13 & 14)

Why does boron primarily form covalent compounds?

Options

ABecause it has a high number of electrons
BBecause of its small size and high ionization enthalpy
CBecause it has a low melting point
DBecause it has a high electrical conductivity

Correct answer

B. Because of its small size and high ionization enthalpy

Step-by-step solution

Due to the small size of boron, the sum of its first three ionization enthalpies is very high. This prevents it from forming +3 ions and forces it to form only covalent compounds.

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