Look at the following orbital diagram. What principle/rule does it break? 1s 2s 2p Pauli's Exclusion Principle O Hund's Rule Aufbau

The Auf Bau Principle, Hund's rule, and the Pauli exclusion principle are used to determine the lowest energy electron configuration of an atom, called the ground state; any other possible configuration is higher in energy, an excited state.   Which of the following valence shell electron configurations are excited states?           5s   5px   5py   5pz   4dz2   4dx2-y2   4dxy   4dyz   4dxz   (1)   ­ up, down   ­up               up­   up­   (2)   up, down­ ¯             ­   ­up   ­up   (3)   ­ ­up, down           up ­ up ­ up ­   (4)   ­ ¯up, down   ­up   ­up   ­up             1, 2, and 3 (b) 1 and 4      (c) 2 only        (d) 4 only        (e) 3 only   answer is B. i need explanation.

According to Aufbau principle, the 2p orbital should appear after which orbital? 1s B 2s C) 3s 4s

Here are sketches of four electron orbitals: A Are any of them s orbitals? List the s orbitals, if any. Are any of them p orbitals? List the p orbitals, if any. B yes no 0 yes no 0,0,... X с S 88

using the aufbau principle , indicate how many electrons a 7s subshell can hold   select the correct answer :  14 10 2 6