Half Life
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The diagram shows 32 atoms
32 of the Red are the parent isotope
0 of the atoms are daughter isotopes
How many half-lives have occurred?
0
1
2
3
Tags
NGSS.HS-PS1-8
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The diagram shows 32 atoms.
16 of the Red are parent isotopes
16 of the Green are daughter isotopes
How many half-lives have occurred?
0
1
2
3
Tags
NGSS.HS-PS1-8
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After the third half-life, how much of the sample is left?
1/2
1/3
1/16
1/8
Tags
NGSS.HS-PS1-8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?
33.0 mg
12.5 mg
.33 mg
15.8 mg
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the half-life of an isotope if after 20.0 days you have 4.0 grams remaining of a 64.0 grams sample?
25 days
5.0 days
80 days
4.25 days
6.
MULTIPLE CHOICE QUESTION
1 min • 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?
half-life
half-lives
half-lives
half-lives
Tags
NGSS.HS-PS1-8
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After the third half-life, how much of the sample is left?
1/2
1/3
1/16
1/8
Tags
NGSS.HS-PS1-8
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