
Radioactive Decay & Half-life Midterm Review
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is radioactive decay?
Back
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the transformation of the element into a different element or isotope.
2.
FLASHCARD QUESTION
Front
What is an alpha particle?
Back
An alpha particle is a type of radiation consisting of two protons and two neutrons, which is emitted during alpha decay.
3.
FLASHCARD QUESTION
Front
What is a beta particle?
Back
A beta particle is a high-energy, high-speed electron or positron emitted during beta decay.
4.
FLASHCARD QUESTION
Front
What is gamma radiation?
Back
Gamma radiation is a form of electromagnetic radiation of high frequency and energy, emitted from a nucleus during radioactive decay.
5.
FLASHCARD QUESTION
Front
What is half-life?
Back
Half-life is the amount of time it takes for half the nuclei in a sample of a radioactive isotope to decay.
6.
FLASHCARD QUESTION
Front
How do you calculate the remaining amount of a substance after a certain number of half-lives?
Back
Remaining amount = Initial amount × (1/2)^(number of half-lives).
7.
FLASHCARD QUESTION
Front
If the half-life of a substance is 10 years, how much of a 100 g sample remains after 30 years?
Back
12.5 g remains after 30 years.
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