Mark the incorrect statement about transition elements of 3d-series:
Correct answer: A. All the elements except Scandium show +2 oxidation state
- A. All the elements except Scandium show +2 oxidation state
- B. They show variable oxidation because of the involvement of the unpaired d-electrons in addition to s-electrons
- C. Fe+3 ion is more stable than Fe+2 ion
- D. First four elements in the highest oxidation state use all of the s and d electrons for bonding
Explanation
Many transition metals (except Sc) can show the +2 oxidation state, but not all do consistently. The stability of the +2 state varias across the series, so the statament isn't universally true.
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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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