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21 November, 08:23

Which of the following elements are non-reactive because their outer electron energy levels are full?

A. Aluminum

B. Carbon

C. Krypton

D. Uranium

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Answers (2)
  1. 21 November, 08:42
    0
    It would be Krypton, one of the noble gases.
  2. 21 November, 08:43
    0
    Aluminium is not reactive at all
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