Question

How to find Valency of Baron

Answer 1

·   Number of valence electrons ≤ 4

Then the valency = number of valence electrons

·  Number of valence electrons >4

Then the valency = 8 - number of valence electrons







Valency of Boron element: Electronic configuration of B = 1S2 2S2 2p1 , so in B atom, number of outer most electrons = 3, so its valency = +3.

Answer 2

Hey

Boron has atomic number as 5
So it's electron configuration will be 2,3.
So it's valency is 3 because it can loose 3 valence electrons but it's hard to gain 5 more electrons to attain stability.

Hope this helps
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