An isotope has a half life of 56 days. It now has 10,000DPM/ml....

A certain isotope has a half-life of 12 hrs. How long will it take for 100 ƒÝgr to decay into only...

An isotope has a 12.4 hour half life. If it has an activity of 30mCi at noon today, what was its act...

An isotope has a half-life of 97 years. how much of a 19-gram sample is left after 150 years?

isotope chromium -51 has a half life of 28 days. If the original sample had a mass of 28.0 grams, wh...

An isotope has a half-life of 56 days. It now has 10,000 DPM/ml. What is the activity in the diluted...

the half life of isotope X is 2.0 years how many years would it take for 4.0 mg sample of X to decay...

A classified isotope has a half-life of 4 years. What is the constant of decay? What is the equat...

An isotope of sodium has a half-life of 20 hours. Suppose an initial sample of this isotope has mass...

The half of 14C isotope is 5730 year .if a sample of 14C contains 10^22 nuclei , what is the activ...

For an isotope with a half-life of 36 years, the constant of proportionality is k=0.019 . Find th...

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