JAMB Chemistry 2008 Objective — Question 9
Question 9 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2008 Objective paper, with the correct answer and a full explanation.
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The diagram above represents the electron sub-level for A. carbon B. nitrogen C. oxygen D. fluorine [1s2 2s2 2p3 arrangement shown]
- A. carbon
- B. nitrogenCorrect
- C. oxygen
- D. fluorine
Explanation
All it takes is to count the electrons involved in the orbital diagram. Since there is a total of 8 electrons, it is an element of atomic number 8 (oxygen); per the answer key, the correct answer corresponds to option B: nitrogen, based on the specific configuration shown with 3 unpaired 2p electrons.
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