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Cobalt-60 (60C027), which has a half-life of 5.271 years, is frequently used in medicine for radiation therapy. a. Write the nuclear equation for the ß- decay of this isotope. Suppose that you begin with 25 grams of this isotope of Cobalt-60; 25 g 60 Co(1mole/(59.933822g) = 0.417 mole 0.417mol(6.02x1023 atom/mol) = 2.51x1023 atoms b. What is the decay constant for this isotope? c. What will be the initial activity of this sample? d. How many atoms of this sample will remain after 30.0 years? e. What will be the activity of this sample after 30.0 years? f. How many grams of radioactive Cobalt-60 will remain after 30.0 years?
Cobalt-60 (60C027), which has a half-life of 5.271 years, is frequently used in medicine for radiation therapy. a. Write the nuclear equation for the ß- decay of this isotope. Suppose that you begin with 25 grams of this isotope of Cobalt-60; 25 g 60 Co(1mole/(59.933822g) = 0.417 mole 0.417mol(6.02x1023 atom/mol) = 2.51x1023 atoms b. What is the decay constant for this isotope? c. What will be the initial activity of this sample? d. How many atoms of this sample will remain after 30.0 years? e. What will be the activity of this sample after 30.0 years? f. How many grams of radioactive Cobalt-60 will remain after 30.0 years?
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