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Boron has three valance electrons. Boron also has three electtrons in outermost energy shell.

The 'Valance' number of electrons tells you how many bonds will form between boron and other atoms.

Compare with oxygen . Oxygen has two valance electrons . However, oxygen has 6 electrons in its outermost energy shell. This means that oxygen will form two bonds between other atoms. Thus leaving four electrons uncombined; they are known as 'lone pairs'.

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lenpollock

Lvl 17
1w ago

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