| 11. | As these metals go superconducting, electrons with oppositely directed spins couple to form singlet states.
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| 12. | The ground electronic state of carbon monoxide is a singlet state since there are no unpaired electrons.
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| 13. | The radiative decay from an excited triplet state back to a singlet state is known as phosphorescence.
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| 14. | Per the radical pair mechanism photopigments absorb a photon, which elevates it to the singlet state.
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| 15. | Let \ phi be the spin singlet state for a pair of electrons discussed in the EPR paradox.
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| 16. | The molecule is excited with near infrared radiation to the singlet state ( with no unpaired electrons ).
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| 17. | Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.
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| 18. | The result is a slow process of radiative transition back to the singlet state, sometimes lasting minutes or hours.
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| 19. | Initially, the absorption of a photon causes an electron to be excited into a singlet state of the Q band.
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| 20. | The Soret band arises from a strong electronic transition from the ground state to the second excited singlet state ( S0 ?
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