Define Mass number and it's example
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Answer:
The mass number of an element is the total number of elementary particles present in the nucleus of an atom.
Example:
The atom Helium contains 2 protons and 2 neutrons in its nucleus so the mass number of Helium is 2+2 = 4.
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Explanation:
The total no. of protons and electrons in an atom.
Ex-- Atom of a carbon consist 6protons and 6electron
Therefore :mass no. Of carbon is 12.
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