MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesPrevious Year Questions
Which one of the following ions has electronic configuration Ar 3d ? (Atomic numbers: Mn = 25, Fe = 26, Co = 27, Ni = 28) (CBSE AIPMT 2010) (a) Co (b) Ni (c) Mn (d) Fe
Answer
A
Explanation
Among the given options, 3 Co possess 6 Ar 3d electronic configuration. 7 2 Co Ar 3d ,4s 3 6 Co Ar 3d