Half-Life

Half-Life

9th - 12th Grade

10 Qs

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Half-Life

Half-Life

Assessment

Quiz

Chemistry

9th - 12th Grade

Medium

Created by

Rachel Mroch

Used 22+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

1.25mg
1.25g
10g
10mg

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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?

3.0g
0.25mg
0.3g
0.25g

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is Half-life?

The amount of time it takes for some of the nuclei in a sample of the isotope to decay
The amount of time it takes for half the electrons in a sample of the isotope to decay
The amount of time it takes for half the nuclei in a sample of the isotope to decay
the amount of time it takes to double the nuclei in a sample of the isotope to decay

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

1 half-life
2 half-lives
3 half-lives
4 half-lives

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

After 22,800 years, approximately what percentage of the original carbon-14 remains?

15%

12.5%

6.25%

3.125%

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What is the half-life of iodine-131?

32 days
8 days
16 days
24 days

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The % of the parent isotope remaining after 1 Half Life.

50%

25%

12.5%

6.25%

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