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What are the electrons that have 2 electrons in the valance shell?

April 26, 2017electrons Shell valance

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What are the electrons that have 2 electrons in the valance shell?

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I think you mean “what elements have two electrons in the valence shell”. The elements that are thought to have two valence electrons are the elements in the second column of the periodic table, (e.g. Mg – magnesium, Ca – calcium, etc.). He – helium is also known to have two valence electrons.