Which pair of elements has abnormal electronic configuration:
Correct answer: B. Cr, Cu
- A. Ti, V
- B. Cr, Cu
- C. Cr, Mn
- D. Ni, Co
Explanation
Two elements "C" and "Cu" have different electronic configuration.24Cr [Ar] 3d5 4s124Cu [Ar] 3d10 4s1
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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