Which of the following electronic configurations represents an element that does NOT belong to the d — Periodic Table and Periodicity Chemistry Question
Question
Which of the following electronic configurations represents an element that does NOT belong to the d-block despite having electrons in the d-subshell?
Answer: C
💡 Solution & Explanation
The configuration $[Xe] 4f^{14} 5d^{10} 6s^2 6p^1$ belongs to Thallium (Tl, Z=81), which is a p-block element as the last differentiating electron enters the $6p$ orbital.
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