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half life

Authored by Napin Espeleta

Physics

10th Grade

Used 17+ times

half life
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20 questions

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1.

MULTIPLE CHOICE QUESTION

15 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

15 mins • 1 pt

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

0.25g
2.5g
25g
80g

3.

MULTIPLE CHOICE QUESTION

15 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

4.

MULTIPLE CHOICE QUESTION

15 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

2 mins • 1 pt

Media Image

What is the half-life of iodine-131?

32 days
8 days
16 days
24 days

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which diagram best represents the percentage of this radioactive isotope sample that will remain after 2 half-lives?

Media Image
Media Image
Media Image
Media Image

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Selenium-83 has a half life of 25 minutes. How many minutes would it take for a 20 milligram sample to decay and only have 1.25 milligrams of it remaining? 

25 minutes
50 minutes
75 minutes 
100 minutes

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