Question

why does boron have - 3 valency​

Answer 1

Answer:

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Explanation:

BORON HAS -3 VALANCY BECAUSE IT HAS 5 ELECTRON IN ITS OUTERMOST SHELL AND IT IS DIFFICULT TO DONATE 5 ELECTRONS TO COMPLETE OCTATE OR DUPLET RULE SO IT JUST ACCEPTS 3 ELECTRON TO COMPLETE ITS OCTATE RULE

Answer 2

Boron has valency 3 because 5 is its atomic number so the electronic configuration will be 2,3 so according to the octet rule there must be 8 electrons in the second and further shell so it looses 3 electrons to make it self stable no remember when electrons are lost the valency has a positive sign and when electrons are gained valency has a negative sign so to get itself stable it can either take 5 electrons or give 3 electrons but electrons are lazy so they take the easiest options which over here is losing 3 electrons thus the valency is +3