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A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons...

Chemistry
JAMB 1988
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
  • A. 20
  • B. 18
  • C. 16
  • D. 2
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Correct Answer: Option A
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