Juliet started working with a radioactive substance. In 1997, she started with 200 g. When she measured again in 2002, she had 100 g left. In 2007, she had 50 g.
Which substance is she most likely measuring?
rubidium-91
iodine-131
cobalt-60
carbon-14
1 answer
The substance she is most likely measuring is iodine-131. Iodine-131 has a half-life of approximately 8 days, which means that it decays relatively quickly compared to the other options. The decrease in mass of the substance over the years aligns with the short half-life of iodine-131.
4 answers