Which one of the following is an example of a transition element?
Correct answer: B. Co
- A. Na
- B. Co
- C. Ba
- D. Ra
Explanation
Transition elements (transition metals) have partially filled d orbitals. IUPAC defines transition elements as an element having a d subshell that is partially filled with electrons, or an element that can form stable cations with an incompletely filled d orbital.
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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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