Chang Kirk
02/02/2024 · Middle School
\begin{tabular}{l} ITEM \( 5(3,0) \) \\ A partir de um átomo radioativo \( (X) \), chega-se ao elemento 86 Rn \( n^{220} \) por meio de duas emissōes \\ alfa e duas emissōes beta. Realize os cálculos necessários e determine os números atômico e de \\ massa do átomo radioativo \( X \). \\ \hline\end{tabular}
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O átomo radioativo \( X \) é Polônio (Po) com número atômico 84 e número de massa 228.
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