The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
reactants |
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isotopes |
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products |
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ions |