mention physical properties of boron
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Boron is allotropic and exists as a powder or a metal-like substance.
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just about boron or boron family dear?
ashishdeb:
Aluminum, gallium, indium, and thallium are metallic. They each have three electrons in their outermost shell (a full s orbital and one electron in the p orbital) with the valence electron configuration ns2np1. The boron family adopts oxidation states +3 or +1
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