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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
Question
What are isotopes? Explain by giving an example.
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Answer

Isotopes are the atoms of the same element having the same atomic number but different mass numbers.
For example: $^{35}\text{Cl}_{17}\text{ and }^{37}\text{Cl}_{17}$ are isotopes of chlorine.

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