![]() ![]() Why does chromium have exceptional electronic configuration? What is electronic configuration of copper and chromium?Įlectronic configuration of Chromium (Cu = 29) Cu (Z = 29) = 1s² 2s² 2p⁶ 3s² 4p⁶ 4s¹ 3d¹⁰Cu (Z = 29) = 3d10 4s1These electronic configurations are unique since without filling the 4s orbitals completely, electrons entered into 3-d orbitals. hence, Chromium violates Aufbau’s Principle. 4s orbital is a lower energy orbital as compared to 3d. According to the Aufbau principle, the orbital with the lower energy level must be filled first completely, before moving on to the next orbital. Why does chromium violate the Aufbau principle? Copper atoms are said to have a configuration of 3d10 4s1 as opposed to 3d9 4s2 as might have been expected from the general trend. How do you explain the anomalous electronic configuration of chromium and copper?Ĭhromium is said to have a configuration of 3d5 4s1 as opposed to 3d4 4s2. Elements such as copper and chromium are exceptions because their electrons fill and half-fill two subshells, with some electrons in the higher energy level shells. Why do electron configurations of chromium and copper contradict the Aufbau principle?Īccording to the Aufbau principle, these electrons should always fill shells and subshells according to increasing energy levels. The order of filling of electrons occupying the 3d subshell gets concerned in chromium and copper and because of distress in 3d subshell, these elements possess exceptional configuration. Why does copper and chromium have different electronic configuration? 8 What is the electron configuration of copper ( D10 )?.7 Why are copper and chromium exceptions to the general rule?.6 Why is Chromium an electron configuration?.5 Why is copper anomalous electron configuration?. ![]() 4 Why do the actual electron configurations for some elements differ from those assigned using the Aufbau principle?.3 What is electronic configuration of copper and chromium?.2 How do you explain the anomalous electronic configuration of chromium and copper?.1 Why does copper and chromium have different electronic configuration?. ![]()
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