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Electron Configurations: Rules and Principles 1 of 10 > ReviewI Constants | Periodic Table When writing the ground-state electron contiguration of a many-electron atom, three main rules must be tollowed e The autbau principle: Electrons are adced to the lowest energy orbitals available The Pauli exclusion principle: No two electrons in an atom can have the same set of four quantum numbers (n, £, me, and ms). e Hunds rule: For degenerate orbitals, the lowest energy state is attained when the number of electrons with the same spin is maximized. So for a degenerate set of orbitals, one electron goes into each orbital until all the orbitals of the subshell are halt-filled. Once all the orbitals of the subshell are halt-filled the pairing of electrons can take place. Note that aufbau is the German word for building upElectron Configurations: Rules and Principles Part A Classify each orbital diagram for ground-state electron configurations by the rule or principle it violates. Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help Aufbau violation Hund violation Pauli violation 3d 4d 2p 4s 1s 5s 2s 3d 4s Submit Previous Answers X Incorrect; Try Again; 5 attempts remainingPart B The following sets of quantum numbers, listed in the order n, , , and ms, were written for the last electrons added to an atom, Identity which sets are valid and classify the others by the rule or principle that is violated. Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help 3 2 -2+ 3 1 -3 2 -1 3 1 01 4 10 3 1 +1 +1 3 2 +2 + Valid Pauli violation Other violation Submit

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