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17 November, 06:54

Summarize: in general, how can you determine the mass number of the daughter product after alpha decay has taken place? How can you determine the atomic number?

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  1. 17 November, 09:51
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    An alpha particle is a helium nucleus ... a bundle of

    two protons and two neutrons.

    So ...

    After an atom expels one alpha particle, if nothing else happens

    to the nucleus, its new atomic mass is 4 less than it was originally,

    and its atomic number is 2 less than it was originally ... it's now an

    atom of a different element.
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