Question
Thorium-234 has a half-life of 24.1 days.
How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
75 g
50 g
25 g
12.5 g
How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
75 g
50 g
25 g
12.5 g
Answers
GPT 3.5
25 g
After 24.1 days, half of the 100-g sample will remain unchanged, leaving 50 g.
After another 24.1 days (total of 48.2 days), half of the remaining sample will remain unchanged, leaving 25 g.
After 24.1 days, half of the 100-g sample will remain unchanged, leaving 50 g.
After another 24.1 days (total of 48.2 days), half of the remaining sample will remain unchanged, leaving 25 g.