Which of the following transition elements has maximum number of unpaired electrons in its ground state?
Correct answer: B. Cr
- A. Mn
- B. Cr
- C. Fe
- D. Ni
Explanation
Electronic configuration of Cr= Cr = (Ar) 3d5 4s1. According to the electronic configuration, the number of unpaired electrons is 6. Thus, Cr has the maximum number of unpaired electrons in ground state.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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