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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
Question
Define isobar, write its one example.
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Answer

Atoms of different elements having same mass number but different atomic number are known as isobars. For e.g. $_{20}\text{Ca}^{40}$ and $_{18}\text{Ar}^{40}.$

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