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(D) The arrangement of electrons in an atom is governed by the following fundamental principles:$(i)$ Aufbau principle: Electrons fill orbitals in ord

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All of the above

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(D) The arrangement of electrons in an atom is governed by the following fundamental principles:$(i)$ Aufbau principle: Electrons fill orbitals in order of increasing energy.$(ii)$ Pauli exclusion principle: No two electrons in an atom can have the same set of all four quantum numbers.$(iii)$ Hund's rule of maximum multiplicity: Pairing of electrons in degenerate orbitals does not occur until each orbital is singly occupied.Therefore,all these rules collectively determine the electronic configuration of atoms.

On the basis of which rules does the arrangement of electrons take place in atoms?

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