What's with Beryllium, Hydrogen, Lithium, and Boron?

Science
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My teacher said something about 2 valence electrons in Beryllium, Hydrogen, Lithium and Boron.

So if they loose all of their valence electrons, they will have two valence electrons left?

Unlike the other ones that loose all of their valence electrons and have 2 valence electrons left?

Dec 13th, 2015

Thank you for the opportunity to help you with your question!

Start with the periodic table atom numbers.

1. hydrogen which have total 1 electron and have valency of 1. means it can bind with other atom by 1 electron and make a single bond.

2. Helium which have 2 electron but no valence electron

3. Lithium which have 3 electron but only 1 is used as valence electron because other two makes a pair so not useful.

4. Beryllium which have 4 electron but no valence. But at a time of excitation it can bind to other atom.

5. Boron total have 5 electron an 1 valence electron.


Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 13th, 2015

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