Resource Problems Flashcards
(2 cards)
1
Q
A gamma-ray photon energy is often expressed in electronvolts (eV).
What is the wavelength of a gamma-ray of keV energy?
A
- Use the formula wavelength(nm) = 119,626.6/deltaE(kj/mol) after converting eV to kJ/mol.
2
Q
Unit of the Activity <-> 1/2 life calculation
A
Activity = k * N
1) You want to calculate the amount of the substance in ATOMS. So you get moles, then avagadro.
2) You want the k in SECONDS. So, you convert the half-life to seconds, THEN use that value to get K.