Half-Life Flashcard Spring 24

Half-Life Flashcard Spring 24

Assessment

Flashcard

Chemistry

9th - 12th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is half-life?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

2.

FLASHCARD QUESTION

Front

If you start with 100 grams of a substance with a half-life of 5730 years, how much will remain after one half-life?

Back

50 grams.

3.

FLASHCARD QUESTION

Front

What is the half-life of iodine-131?

Back

8 days.

4.

FLASHCARD QUESTION

Front

What percentage of a radioactive substance remains after 2 half-lives?

Back

25%.

5.

FLASHCARD QUESTION

Front

How much of a 100 gram sample of C-14 remains after 11,460 years?

Back

25 grams.

6.

FLASHCARD QUESTION

Front

If the half-life of uranium-232 is 70 years, how many half-lives are needed to reduce 8.0 g to 1.0 g?

Back

3 half-lives.

7.

FLASHCARD QUESTION

Front

What is the remaining percentage of carbon-14 after 22,800 years?

Back

6.25%.

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