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What element has two electrons in the outer shell and has electrons in four shells?
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What element has two electrons in the outer shell and has electrons in four shells?

User Umlum
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Calcium. It is classified chemically as one of the alkaline earth elements. It is found in group two of the periodic table. It forms a white coating of calcium nitride (Ca3N2) in air. The symbol is classified as Ca. It is a metallic metal.
User Subb
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