Iodine-131 is a radioactive isotope that is used as a medical tracer to study and treat the thyroid gland. this radioactive element emits both beta particles and gamma waves. to effectively stop both beta particles and gamma waves, scientists use a chamber composed of

a) concrete.
b) lead.
c) metal.
d) plastic.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

sure im new too!

explanation: