3. Quantum numbers describe the energy level of an orbital and define the shape and orientation of the region in space where the electron is most likely to be found.
(a) What are the similarities and the difference between:
i. a 1s orbitals and a 3s orbitals
ii. a 2px orbitals and 2pz orbitals
(b) The highest energy electrons in an atom Q have the principal quantum number n = 4 and the angular quantum number l = 0. What is the maximum number of electrons present in atom Q?
(c) An atom X contains eight electrons in s orbitals, twelve electron in p orbitals, and eight electrons in d orbitals. Write the electronic configuration of X and determine what is atom X?
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