- #1
lando45
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Hey,
I am a little stuck with this question I have been set:
"A freshly prepared sample of a certain radioactive isotope has an activity of 9.0 mCi. After 4.00 h, its activity is 7.50 mCi.
(a) Find the decay constant.
(b) Find the half-life.
(c) How many atoms of the isotope were contained in the freshly prepared sample?
(d) What is the sample's activity 30.0 h after it is prepared?"
I have a bunch of radioactivity formulae, but I don't know which one to use, none of them really seem appropriate...
So could point me in the right direction as to how I go about solving these?
Many thanks,
Rory (Lando 45)
I am a little stuck with this question I have been set:
"A freshly prepared sample of a certain radioactive isotope has an activity of 9.0 mCi. After 4.00 h, its activity is 7.50 mCi.
(a) Find the decay constant.
(b) Find the half-life.
(c) How many atoms of the isotope were contained in the freshly prepared sample?
(d) What is the sample's activity 30.0 h after it is prepared?"
I have a bunch of radioactivity formulae, but I don't know which one to use, none of them really seem appropriate...
So could point me in the right direction as to how I go about solving these?
Many thanks,
Rory (Lando 45)