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Nucleus emits an alpha particle

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Reference no: EM131911092

When a nucleus emits an alpha particle, the atomic number (increases or decreases)? by (1),(2),(3),(4)? and the mass number (increases) or (decreases)? by (1),(2),(3,)(4)?

Hint: the words or numbers in parentheses with a question mark behind them are the viable answers.

Reference no: EM131911092

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