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Atoms, Molecules and Radicals — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAtoms, Molecules and Radicals1 Mark
Question
Define: Mass number
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Answer

Mass number— Mass number is the sum of the number of protons and neutrons present in the nucleus of an atom. It is denoted by A.

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