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Ultraviolet Radiation in Fluorescence

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In the process called fluorescence some substances absorb photons of one kind of radiation (ultraviolet) and give out photons of a different kind, when infrared radiation falls on these materials, visible light is not emitted, why? no further info re fluorescence needed, and which element results if two protons and two neutrons are ejected from a radium nucleus with atomic number 88 and mass of 226?

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This solution gives a reaction mechanism of the radium nucleus fluorescing to its daughter nucleus. Brief explanations are included.

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In the process called fluorescence some substances absorb photons of one kind of radiation (ultraviolet) and give out photons of a ...

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