The mass number of an atom is slightly less than the actual atomic mass
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The mass number of an atom is slightly less than the actual atomic mass. ... The mass number is not equal to the atomic mass because of isotopes. Mass number is simply the number of protons and neutrons. The actual atomic mass of an atom is the weighted average of all existing atoms & isotopes per element.
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Explanation:the mass no.of an atom is slightly less than the actual atomic mass because
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