how do u find the atmoic masses in a roundoff value?
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atomic mass is the mass of the nucleus of an atom.atomic masses are not always round off values.. for e.g.. chlorine has an atomic mass of 35.5....but for those which we write at. masses are only approximate round off values..
vigneshwer:
one of the simple formula is Atomic mass = Number of protons + number of neutrons + number of electrons
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