MADMADS12 MADMADS12

09-09-2016
Physics

contestada

What is the half life of each of these radioactive isotopes?
a radioactive isotope decreased to one-fourth its original amount in 18 months.

Respuesta :

09-09-2016

One fourth means (one half) of (one half) .

So the 18 months must be two half-lifes.

The half-life of this particular isotope is 9 months.

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OldGregg OldGregg

09-09-2016

The half life would be 9 months long.

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