Answers

2016-03-18T20:29:58+05:30
The mass of an atom (total number of protons and neutrons) is measured in terms of a.m.u. i.e., atomic mass unit.


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2016-03-18T20:32:57+05:30
The mass of an atom=number of protons+neutrons present in nucleus of                                                        an atom 
this is calculated in atomic mass unit

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