The electronic configurations of Eu(Atomic No 63), Gd(Atomic No 64) and Tb (Atomic No. 65) are

1. A. [ Xe ]4f 7 6s 2 , [ Xe ]4f 8 6s 2 and [ Xe ]4f 8 5d 1 6s 2
2. B. [ Xe ]4f 7 5d 1 6s 2 , [ Xe ]4f 7 5d 1 6s 2 and [ Xe ]4f 9 6s 2
3. C. [ Xe ]4f 6 5d 1 6s 2 , [ Xe ]4f 7 5d 1 6s 2 and [ Xe ]4f 8 5d 1 6s 2
4. D. [ Xe ]4f 7 6s 2 , [ Xe ]4f 7 5d 1 6s 2 and [ Xe ]4f 9 6s 2

Attempt this NEET 2016 Chemistry question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.