A meia-vida do núcleo é 122,2 s; a meia-vida do é 26,9 s. Se em um dado instante uma amo...
A meia-vida do núcleo 
é 122,2 s; a meia-vida do 
é 26,9 s. Se em um dado instante uma amostra possui quantidades iguais de 
e de 
, qual é a razão entre o 
e o 
depois de (a) 3,0 minutos? (b) 12,0 minutos?
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Solutions For Problems in Chapter 43
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