Radioactivity
Interactive Video
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Physics
•
9th - 10th Grade
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Becquerel discover when he observed the blackening of a photographic plate?
The properties of phosphorescent materials
The impact of electric fields on compounds
The presence of radioactive substances
The effect of visible light on silver
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of decay involves the emission of helium nuclei?
Alpha decay
Neutron decay
Gamma decay
Beta decay
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between the number of decaying nuclei and time in radioactive decay?
It is independent
It is logarithmic
It is inversely proportional
It is directly proportional
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the SI unit of radioactive activity?
Gray
Rutherford
Curie
Becquerel
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the half-life of a radioactive substance defined?
The time taken for the substance to completely decay
The time taken for the substance to reduce to one-fourth of its initial value
The time taken for the substance to reduce to half of its initial value
The time taken for the substance to double its initial value
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a nucleus during alpha decay?
It absorbs a neutron
It emits an alpha particle
It emits a gamma ray
It emits a beta particle
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In alpha decay, what is the daughter nucleus?
The original nucleus
A nucleus with two fewer protons and neutrons
A nucleus with two more protons and neutrons
A nucleus with the same number of protons and neutrons
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