Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?
Correct answer: D. Cu2+
- A. Cu
- B. Cu+
- C. Cu-
- D. Cu2+
Explanation
Electronic configuration of the options are as follows:Option A, Cu: 1s2 2s2 2p6 3s2 3p6 3d10 4s1, so its d subshell is filledOption B, Cu+: 1s2 2s2 2p6 3s2 3p6 3d10, so its d subshell is filledOption C, Cu-: 1s2 2s2 2p6 3s2 3p6 3d10 4s2, so its d subshell is filled.Option D, Cu2+: 1s2 2s2 2p6 3s2 3p6 3d9, so its d subshell is not filled completely, one orbital is partially filled, so it is the correct answer.
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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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