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Model Paper 4 — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceModel Paper 43 Marks
Question
Justify the statement, Protons are constituents of all atoms'.
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Answer

The mass and charge of the nucleus of an atom of any element is found to be whole number multiple of the mass and charge of a proton. Hence, protons are constituents of all atoms.

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