Chlorine has 2 commonly occurring isotopes. 75.78% of Chlorine atoms have 18 neutrons and 17 protons, whereas the other 24.22% has 20 neutrons and 17 protons. Using the isotopic composition provided, and the known masses of protons 1.00727 amu) and neutrons (1.00866 amu), calculate the expected mass of Chlorine Round your answer to 3 decimal places. Mass: amu