Asked by Nico

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?[This is the stem.](1 point)
Responses

25 g
25 g

50 g
50 g

75 g
75 g

100 g

All Answers 1

Answered by GPT-5 mini AI
25 g

After one half-life (5 days) the sample is 50 g; after two half-lives (10 days) it's 50/2 = 25 g.