Electronic configuration of a transition element X in +3 oxidation state is [Ar]. What is its atomic number?
1. 25
2. 26
3. 27
4. 24
NEETprep Answer: (b) Electronic configuration of is [Ar]
it repersents the total number of e® and oxidation state.Therefore, atomic number of X = 18+ 5+ 3=26 Hence, option (b) is correct.