You have 976 grams of a radioactive kind of rhodium. How much will be left after 120 seconds if its half-life is 30 seconds?
grams
After 120 seconds (4 half-lives), the amount of radioactive rhodium remaining can be calculated using the half-life formula:
Amount remaining = Initial amount * (1/2)^(number of half-lives)
Plugging in the values:
Amount remaining = 976 * (1/2)^(4)
Amount remaining = 976 * (1/16)
Amount remaining = 61 grams
Therefore, after 120 seconds, there will be 61 grams of the radioactive rhodium left.