state the application of theory and design consideration of turnig
Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If you begin with 36.6 mg of this isotope, what mass remains after 190 hours have passed?
What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes?