What is the atomic mass of chlorine?

Jump to Atomic Structure - [Bohr Model of Chlorine], Number of Energy Levels: 3. First Energy Level: 2. Second Energy Level: 8. Third Energy Level: 7. read more

If you look at the chlorine box, with the symbol Cl, you see the atomic mass is equal to 35.453 atomic mass units. This is the weighted average mass of chlorine, including its isotopes, as found in nature. This also means that one mole of chlorine atoms has a mass of 35.453 grams. read more

The average atomic mass of the given sample of chlorine is "35.46 u". Change the percentages to their decimal forms: 24.47%=24.47/100=0.2447 75.53%=75.53/100=0.7553 Multiply the mass of each isotope by its percent abundance and add. read more