Search Header Logo

half life

Authored by Craig LaPerriere

Chemistry

9th - 12th Grade

NGSS covered

Used 25+ times

half life
AI

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

    Content View

    Student View

30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 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

Tags

NGSS.HS-PS1-8

2.

MULTIPLE CHOICE QUESTION

2 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

Tags

NGSS.HS-PS1-8

3.

MULTIPLE CHOICE QUESTION

2 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

Tags

NGSS.HS-PS1-8

4.

MULTIPLE CHOICE QUESTION

2 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

NGSS.HS-PS1-8

5.

MULTIPLE CHOICE QUESTION

2 mins • 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

Tags

NGSS.HS-PS1-8

6.

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

Tags

NGSS.HS-PS1-8

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The % of the parent isotope remaining after 2 Half Lives.

50%

25%

12.5%

6.25%

Tags

NGSS.HS-PS1-8

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Google

Continue with Google

Email

Continue with Email

Classlink

Continue with Classlink

Clever

Continue with Clever

or continue with

Microsoft

Microsoft

Apple

Apple

Others

Others

Already have an account?