Answers

2015-08-22T18:46:04+05:30
For example oxygen O its atomic no is 8 and atomic mass is 16
nitrogen N atomic no is 7 and atomic mass is 14
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2015-08-22T20:34:50+05:30
For Example; An atom of calcium has atomic number 20 and mass number 40. so that atom is represented by writing symbol of the atom by writing mass number on top and atomic number on bottom of element
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