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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
Question
Write the difference between atomic mass and atomic mass number?
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Answer

Atomic mass is the mass of all the sub-atomic particles present in an atom, mainly proton and neutrons as electron have negligible mass. Atomic mass number is equal to sum of number of protons and neutrons.

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