Which element has the electronic configuration of noble gas notation [Kr] 5s2 4d2 :
Correct answer: C. Zr
- A. Se
- B. Sr
- C. Zr
- D. Mo
Explanation
The electronic configuration of Zirconium (Zr), which has an atomic number of 40, is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d². In noble gas notation, it can be written as [Kr] 5s² 4d². Zirconium is a transition metal. It is located in the fourth period and the d-block of the periodic table.
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