Atomic mass is how heavy one atom of an element is. Calculate the atomic mass.
The figure on the table is an average across the isotopes as they occur in nature. Atomic mass is not a whole number for that reason, which puzzles everybody at first.
1nounatomic massHow heavy one atom of an element is.
“The atomic mass of chlorine is about 35.5.”
atomic mass is a measure.
Practised in Chemistry & Elements