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On homework problem 1.23 I am asked to calculate the wavelength of a y-ray. In the solution then energy of a technetium-99 atom is being multiplied by 1.6022x10^-19 but i don't know where that number came from can anyone explain why it is being multiplied by this number?
For problems involving constants and or conversion values that aren't "well known", the information will most likely be provided either on a formula sheet or within the question. If you have the Periodic Table of Elements that was given with the course reader, most of these values (i.e. constants and equations) are provided on the back.
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