Radioactive Decay Worksheet
This worksheet covers fundamental concepts of radioactive decay, including half-life, types of decay, and nuclear equations, suitable for Grade 9 science students.
Includes
Standards
Topics
Radioactive Decay: Understanding Half-Life and Nuclear Processes
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. What is the definition of half-life in the context of radioactive decay?
The time it takes for a radioactive substance to completely decay.
The time it takes for half of the radioactive nuclei in a sample to decay.
The time it takes for a radioactive substance to become stable.
The time it takes for a radioactive substance to double its mass.
2. Which type of radioactive decay involves the emission of a helium nucleus?
Beta decay
Alpha decay
Gamma decay
Spontaneous fission
3. The process by which an unstable atomic nucleus loses energy by emitting radiation is called .
4. After two half-lives, of the original radioactive sample remains.
5. Beta decay results in an increase in the atomic number of the decaying nucleus.
True
False
6. Gamma rays are a form of electromagnetic radiation and do not have mass or charge.
True
False
7. A radioactive isotope has a half-life of 10 years. If you start with a 100g sample, how much of the isotope will remain after 30 years? Show your calculations.
8. Briefly explain the difference between nuclear fission and nuclear fusion.
Match each type of radiation with its characteristic.
9. Alpha particle
a. High energy electromagnetic wave
10. Beta particle
b. Electron or positron
11. Gamma ray
c. Helium nucleus