The outer electronic configuration of Cu+ ion is 4S03d10 with this configuration the aqueous solution of copper (I) compound is:
Correct answer: D. Colourless
- A. Blue
- B. Greenish blue
- C. Bluish green
- D. Colourless
Explanation
Transition elements exhibit color due to d-d transition. d-d transition is possible only when the d subshell has unpaired electrons. Cu+ has filled the orbital: 4s0 3d10. Due to a lack of unpaired d- electrons Cu+ is colorless.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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