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4 November, 11:01

What is the change in atomic mass number when an atom emits an alpha particle?

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  1. 4 November, 12:52
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    When an atom emits an alpha particle, its atomic number will be reduced by two, and its mass number will be reduced by four s ince atomic number is the number of protons.

    An alpha particle is essentially a helium nucleus composed of two protons and neutrons.
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