
Radioactive Decay and Half-Lives
Interactive Video
•
Chemistry, Physics, Science
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a radioactive isotope?
A form of energy
A stable element that does not decay
A type of chemical bond
An unstable element that eventually decays
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the graph of a radioactive isotope's decay show?
The increase in material over time
The constant amount of material
The decrease in material over time
The stability of the material
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the half-life of an isotope?
The time it takes for the isotope to double in quantity
The time it takes for the isotope to become stable
The time it takes for half of the atoms to decay
The time it takes for all atoms to decay
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which isotope has a half-life of 1.3 billion years?
Lead-194
Germanium-66
Sodium-24
Potassium-40
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the chalk analogy, what happens after 15 minutes?
The chalk becomes radioactive
The chalk doubles in size
Half of the chalk remains
All the chalk is gone
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After two half-lives, what fraction of the original material remains?
1/16
1/8
1/4
1/2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much of Lead-194 remains after 44 minutes?
1/16
1/2
1/4
1/8
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