
Half life practice problems
Flashcard
•
Chemistry, Physics
•
KG - University
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Half-life?
Back
The amount of time it takes for half the nuclei in a sample of the isotope to decay.
2.
FLASHCARD QUESTION
Front
When nuclei decay, massive amounts of __________ is released.
Back
energy
3.
FLASHCARD QUESTION
Front
Nuclear fission is when scientists put atoms together. True or False?
Back
False
4.
FLASHCARD QUESTION
Front
What makes an element radioactive?
Back
When its nuclei decay.
5.
FLASHCARD QUESTION
Front
Barium-122 has a half-life of 2 minutes. If it takes 10 minutes to set up an experiment, how much barium-122 will be left from an 80 g sample?
Back
2.5g
6.
FLASHCARD QUESTION
Front
What happens to the amount of a radioactive substance over time?
Back
It decreases as the nuclei decay.
7.
FLASHCARD QUESTION
Front
What is released during nuclear decay?
Back
Energy.
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