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1 markPaper 1 · Multiple choicePeriodic Table and Periodicity

CSEC Chemistry · May/June 2015 · Paper 1 · Question Q3

Which of the following elements has 7 electrons in its outer shell?

  1. (A)Hydrogen
  2. (B)Oxygen
  3. (C)Nitrogen
  4. (D)Chlorine

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