Which sub shell in the fourth transition series is in the process of completion?
Correct answer: A. 3d
- A. 3d
- B. 4d
- C. 5d
- D. 6d
Explanation
In the fourth transition series, the subshell that is in the process of completion is the 3d subshell. The 3d subshell can hold a maximum of 10 electrons. As electrons fill up the energy levels, they occupy the lower energy levels first before moving to higher energy levels. So, as the 3d subshell fills up, the transition series is progressing towards completion.
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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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