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This element has a complete outermost energy level and is found in the 4th period.
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This element has a complete outermost energy level and is found in the 4th period.

User SeanWM
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Krypton Krypton has 8 electrons in the outermost energy level. Tip:All elements excluding the Lanthinides and Aninides are in order by molecular structure, kind of. The last column will have a full outermost energy level
User Adam Gerard
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