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17. 1s² 2s² 2p 3s² 3p6 4s² 3d¹0 4p65s¹ symbol?
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17. 1s² 2s² 2p 3s² 3p6 4s² 3d¹0 4p65s¹ symbol?

User Vintesh
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The element is Rubidium so the symbol is Rb!
User Daniel Martin
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