Question

A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M., how many grams will be present at 2:00 P. M. on the same day

Answer 1

A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M. 0.5 grams will be present at 2:00 P.M. on the same day.

What is half Life ?

Half life is the amount of time required to reduce to one half of its initial value. The symbol of half life is $t_{1/2}$.

How to calculate the quantity remaining when half life given ?

It is expressed as:

$N_{t} = N_{0} (\frac{1}{2})^{n}$

where,

N(t) = quantity remaining

N₀ = initial quantity

n = half life that have passed

Now put the values in above expression we get

$N_{t} = 1.0\ g \times (\frac{1}{2})^{1}$

     = $\frac{1}{2} g$

      = 0.5 gram

Thus from the above conclusion we can say that A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M. 0.5 grams will be present at 2:00 P.M. on the same day.

Learn more about the Half life here: brainly.com/question/25750315

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