name the atoms of a substance having same atomic number ,but different mass number.give one example of such a substance . how do the structures of such atoms differ?
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these are known as isotopes. Ex. two isotopes of chlorine. One is 35 clorine have mass and other having 37 .This happens because mass of atoms is protons + neutron .In both atoms protons are same but neutron are different.
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Solution. Atoms of a substance having the same atomic number, but different mass numbers are called isotopes. the Structure of each isotope differs by the number of neutrons in its nuclei.
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