1)According to the principle, electrons fill orbitals starting at the lowest available (possible) energy levels before filling higher levels.The number of electrons that can occupy each orbital is limited by the Pauli exclusion principle. If multiple orbitals of the same energy are available, Hund's rule states that unoccupied orbitals will be filled before occupied orbitals are reused.
2)the artificial method of ripening the fruits is called artificial ripening
3)the compound named C60 is called as buckmunster fullerene
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