What is alpha decay?
Unit 5 Review: Nuclear Chemistry

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Chemistry, Physics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (2 protons and 2 neutrons), resulting in a new element with a lower atomic number.
2.
FLASHCARD QUESTION
Front
What is the half-life of a radioactive substance?
Back
The half-life is the time required for half of the radioactive atoms in a sample to decay into a different element or isotope.
3.
FLASHCARD QUESTION
Front
How many half-lives are needed for a substance to decay from 10 g to 1.25 g?
Back
3 half-lives.
4.
FLASHCARD QUESTION
Front
Which radioactive isotope is commonly used in cancer treatment?
Back
Cobalt-60 is commonly used in radiation therapy to treat cancer.
5.
FLASHCARD QUESTION
Front
What particle is emitted during alpha decay?
Back
An alpha particle, which consists of 2 protons and 2 neutrons.
6.
FLASHCARD QUESTION
Front
If a substance has a half-life of 2 minutes, how much of an 80 g sample remains after 10 minutes?
Back
2.5 g of barium-122 will remain after 10 minutes.
7.
FLASHCARD QUESTION
Front
What is the decay product of uranium-238 after alpha decay?
Back
Thorium-234 is the decay product of uranium-238 after it undergoes alpha decay.
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