20 BORON

20

BORON

CHAPTER 20 - BORON (4 pages)- gives various definitions for metals and non-metals (metals exhibit only positive oxidation state with the exception of As, Re and Au, but non-metals exhibit +ve and –ve oxidation states). 

Reason for the sudden change from metallic (Be) to non-metallic (B) properties explained.

 Reason for the stability of B₂H₅I, and instability of B₂H₅Cl is mentioned.