Radioactivity and Half Life

Radioactivity and Half Life

9th Grade

15 Qs

quiz-placeholder

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Radioactivity and Half Life

Radioactivity and Half Life

Assessment

Quiz

Science

9th Grade

Hard

NGSS
HS-PS1-8, HS-PS1-4

Standards-aligned

Created by

Lisa Thompson

Used 1+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Sodium-24 has a half-life of approximately 15 hours. If only one-eighth of the sodium-24 remains, about how much time has passed.

15 hours

30 hours

45 hours

60 hours

Tags

NGSS.HS-PS1-8

2.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Cerium-143 is a radioactive isotope that decays to produce praseodymium-143. The half-life for cerium-143 is approximately 33 hours. If 6.25 g cerium-143 remains from a 100-g sample, which statement is true? Select all that apply.

Cerium-143 decayed for 132 hours.

Cerium-143 decayed for 166 hours.

Two half-lives have passed.

Three half-lives have passed.

Four half-lives have passed.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The graph shows the radioactive decay of a bone that is found to contain 1/8 of the carbon-14 found in living animals today.

5,790 years

11,460 years

17,190 years

22,920 years

Tags

NGSS.HS-PS1-8

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which statement best describes what happens in a fission reaction?

Light nuclei form into heavier nuclei.

Heavy nuclei split into lighter nuclei.

Energy is released, and less stable elements are formed.

Energy is absorbed, and more stable elements are formed.

Tags

NGSS.HS-PS1-8

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The amount of time it takes for half the nuclei in a sample of the isotope to decay is...

Half-Life

Radioactivity

Nuclear Fission

Nuclear Fusion

Tags

NGSS.HS-PS1-8

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If the half-life of 100 grams of a radioactive isotope is 8 years, how many grams will remain in 32 years?

50g

6.25g

25g

12.5g

Tags

NGSS.HS-PS1-8

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

half-life of a 50.0 gram sample is 3 years... how much in 3 more years?

15.0g

12.5g

25.0g

50.0g

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