Question

how does boron have - 3 valency even though it has 3 electrons in the valence shell it will lose it nd it will b +3 then in what case will boron have - 3 pls explain properly ​

Answer 1

Answer:

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Boron has a charge of 5. This is balanced by 5 electrons. Two of them are core electrons and the remaining 3 are valence electrons. The valence electrons may participate in bonding through sharing with other atoms, to make three bonds.

Boron does not exist as B3+ion. Aluminium forms [AlF6 ]3- ion but boron does not form [BF6]3-ion. ... higher than that of Al. (1) Boron has three electrons in the valence shell. ... So, it can have a maximum coordination number of 4.

Explanation:

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