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Half Life

Authored by Lynsey Story

Physics

10th - 11th Grade

NGSS covered

Used 6+ times

Half Life
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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What percentage of a radioactive substance will remain after 2 Half Lives?

50%

25%

12.5%

6.25%

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What % of the parent radioactive isotope remains after 1 half life?

50%

25%

12.5%

6.25%

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What type of decay is being illustrated in following picture? 

beta decay
alpha decay 

Tags

NGSS.HS-PS1-8

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years. 
How many grams are left after 1 half life? 

100 grams
25 grams
2 grams
50 grams

Tags

CCSS.HSF.LE.A.4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The original mass of a radioactive isotope is 600mg. If the half life is 2 hours, what will the mass of the isotope be after 4 hours?

600mg

300mg

150mg

75mg

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The half life of a radioactive isotope is 10 minutes. What percentage of the isotope will be left after 30 minutes?

100%

50%

25%

12.5%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What fraction of a radioactive substance will be left after one half life?

1/2

1/4

1/3

1/8

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