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When the mass number decreases by 4, ______ emission has occurred. negative beta positive beta gamma alpha
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When the mass number decreases by 4, ______ emission has occurred. negative beta positive beta gamma alpha

User Sree Aurovindh
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Alpha particles have a mass number of 4 and 2 protones, which means the given decrease belongs to alpha emssion because that's the mass number of an alpha particle.

Therefore, the answer is alpha.

User Lee Harold
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