Which of the following electronic configurations is correct for 24Cr?
Correct answer: A. 1s2 2s2 2p6 3s2 3p6 3d5 4s¹
- A. 1s2 2s2 2p6 3s2 3p6 3d5 4s¹
- B. 1s2,2s2,2p6,3s2,3p6,4s1,3d4
- C. 1s2,2s2,2p6, 3s2,3p6,3d6
- D. 1s2,2s2,2p6,3s2,3p6,4f6
Explanation
The atomic number of chromium (Cr) is 24. To determine its correct electron configuration, we can use the Aufbau principle, which states that electrons fill the lowest energy orbitals first. The electron configuration for chromium (Cr) is as follows:1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵So, the correct electronic configuration for chromium (Cr) is:1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵.
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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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