Half-Life

Half-Life

Assessment

Flashcard

Chemistry, Physics

8th - 9th Grade

Hard

Created by

Wayground Content

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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

What does a half-life of 3 days mean for an isotope?

Back

It means that after 3 days, half of the original amount of the isotope will have decayed.

3.

FLASHCARD QUESTION

Front

If a radioactive isotope has a half-life of 10 years, how much of a 20g sample will remain after 30 years?

Back

2.5g.

4.

FLASHCARD QUESTION

Front

How do you calculate the age of a rock sample based on its remaining radioactive element?

Back

If 25% of the radioactive element remains, it has gone through two half-lives.

5.

FLASHCARD QUESTION

Front

What is the half-life of copper-64?

Back

13 hours.

6.

FLASHCARD QUESTION

Front

If you start with 20g of copper-64, how much will remain after 26 hours?

Back

5g.

7.

FLASHCARD QUESTION

Front

What is the significance of half-life in radioactive decay?

Back

It helps determine how long it takes for a substance to reduce to half its original amount.

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