Question

Thorium-229 is a highly radioactive isotope used in the treatment of certain cancers. Use the chart to determine how much thorium would remain after 7,340 years if a sample began at 20 pounds of pure Th-229.

Answer 1

10 pounds if u using usateprep

Answer 2

The half-life for Th-229 is 7,340 years. This means that with 20 pounds, in 7,340 years, half would be left, or 10 pounds.