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प्रश्न
Define: Mass number
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उत्तर
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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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
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ANSWER IN DETAIL
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