nessa142 nessa142

05-01-2017
Biology

contestada

what element has 2 energy levels and 1 valance electrons

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Apocrophon Apocrophon

05-01-2017

Lithium is the third element, has 1 valence electron, and the valence electron is in the 2nd energy level.

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I also dont get this :(

Can somebody help me with this question thank you