A. Zinc, Scandium
B. Scandium, Zinc
C. Vanadium, Nickel
D. Argon, Zinc
I had been asked this question in my homework.
My question is based upon Electronic Configurations of Elements and the Periodic Table topic in division Classification of Elements and Periodicity in Properties of Chemistry – Class 11
The best explanation: In the 3d transition series, the have either partially or fully filled 3d orbitals. The 3d transition state starts from Scandium (Z = 21) having electronic configuration as 3s^23d^1 and ends with Zinc (Z = 30) whose electronic configuration is 3s^23d^10.