The maximum covalency of Boron in its compounds is ____________

Maximum covalency of Boron is 4

The maximum covalency of boron in its compounds is 4.

Explanation:

• Boron has an electronic configuration of 1s² 2s² 2p¹.
• In its ground state, boron can form three covalent bonds using its three valence electrons (as in BF₃ or BCl₃).
• However, in certain compounds, boron can expand its valency by utilizing an empty 2p-orbital to accept a lone pair of electrons, forming a coordinate bond.
• This allows boron to achieve a covalency of 4, as seen in compounds like [BF₄]^-.

Conclusion:

The maximum covalency of boron is 4.