Elements in the same row have the same number of (*) levels Which elements in B O U L A N…

Elements in the same row have the same number of (*) levels Which elements in B O U L A N would be in the same family? Which would have the same number of energy levels? Highest mass? Lowest mass? Which is more reactive? Uranium or Lithium Will elements B and U lose electrons in a chemical reactor? Will elements B and U form positive or negative ions? Thanks so much (:

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