The anomalous electronic configuration shown by chromium and copper among the 3-D series of elements is due to:
Correct answer: C. Stability associated with this configuration
- A. Color of ions of these metals
- B. Variable oxidation states of metals
- C. Stability associated with this configuration
- D. Complex formation tendency of metals
Explanation
Two types of electronic configurations are the most stable 1-Completely filled 2: Completely and Partially filled Example: for P subshell 6, having 3 electrons, the p subshell is the most stable The same is the case for the D orbital, in which 10 and then having 5 electrons in the D subshell is the most stable Cr, by having 5 electrons in the D subshell (completely partially filled), is more stable than having 4 electrons in the D subshell, so Cr shows anomalous behavior by having an incomplete 4s subshell. Cu can give a more stable electronic configuration by having 10 electrons in the sub subshell (completely filled) instead of 9 electrons in the D subshell.
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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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