Asked by Mimi

How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?(1 point)
Responses

two
two

three
three

six
six

eight
eight
Question 5
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
1) three

2) 25 g