Ядро атома распалось на 2 альфы частицы и 1 бета . ядро атома - ядро ...

[tex] \frac{8}{3} li[/tex]
[tex] \frac{7}{3} li[/tex]
[tex] \frac{6}{3} li[/tex]
[tex] \frac{4}{2} he[/tex]

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