2) a) Write the electronic formula of the molybdenum atom Mo.
b) Distribute the electrons of the last two levels of the molybdenum atom over quantum cells, observing the Pauli principle and Hund's rule.
c) Knowing that molybdenum in compounds can exhibit a higher valency equal to VI, determine at what sublevels the valence electrons of the molybdenum atom are located and indicate these electrons. Write the values of four quantum numbers for all valence electrons of the molybdenum atom.

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