1. Half-life Pretest
1. Half-life Pretest
Quiz Summary
0 of 7 Questions completed
Questions:
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
Results
Results
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
| Average score | |
| Your score |
Categories
- Not categorized 0%
Check how well you did on your assessment and update your proficiency sheet accordingly.
| Pos. | Name | Entered on | Points | Result |
|---|---|---|---|---|
| Table is loading | ||||
| No data available | ||||
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- Current
- Review
- Answered
- Correct
- Incorrect
- Question 1 of 7
1. Question
1 point(s)The graph shows the radioactive decay of a bone that is found to contain 1/4 of the carbon-14 found in living animals today.
Approximately how old is the bone?
- Question 2 of 7
2. Question
1 point(s)What is Half-life?
- Question 3 of 7
3. Question
1 point(s)The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
- Question 4 of 7
4. Question
1 point(s)After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged. Â What was the original mass of the sample?
- Question 5 of 7
5. Question
1 point(s)If one-eigth of the carbon-14 is remaining then how many half-lives have passed?
- Question 6 of 7
6. Question
1 point(s)What percent of carbon-14 would be left after 5,730 years?
- Question 7 of 7
7. Question
1 point(s)What percent of iodine-131 remains after approximately 27 days?
