Multiple choice

Which of the following pairs represent isoelectronic species?

  1. CO2 and NO2-
  2. N3- and O3
  3. CO32- and NO32-
  4. CO2 and N3-
  5. NO2- and O3

  1. 1 and 2

  2. 1, 2 and 3

  3. 2 and 3

  4. 2 and 4

  5. 3, 4 and 5
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

CO32- (32 electrons) and NO32- (32 electrons) are isoelectronic species. CO2 (22 electrons) and N3- (22 electrons) are isoelectronic species. NO2- (24 electrons) and O3 (24 electrons) are isoelectronic species.

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