What is the half life of this isotope?

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To determine the half-life of an isotope, one can analyze the remaining mass of the isotope over time. In the provided data, the mass halves consistently every three hours: from 40g to 20g at 3 hours, 20g to 10g at 6 hours, and so on. This consistent halving indicates that the half-life of the isotope is 3 hours. The concept of half-life is defined as the time required for the quantity of a substance to reduce to half its initial amount. Therefore, the half-life in this case is clearly established as three hours.
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Hello All,

I would like to know how would I go about determining the half life of an isotope when this infoormation is give to me:

Time
(hr)
Mass Remaining of the Isotope
(g)
0.0 40.00
3.0 20.00
6.0 10.00
9.0 5.00
12.0 2.50
15.0 1.25
18.0 0.63
 
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Would the half life be at how many hours 0 mass of the isotop remains?? Please help :cry: :frown:
 
"Half life" refers to the interval of time required for the remaining amount of the isotope to be half of the original amount. The half life in your example should be quite evident from the data you provided.
 

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