Nuclear Chemistry Basics
A Grade 9 science worksheet covering fundamental concepts in nuclear chemistry, including atomic structure, isotopes, radioactive decay, and nuclear reactions.
Includes
Standards
Nuclear Chemistry Basics
Name:
Date:
Score:
Read each question carefully and provide your best answer. Show all your work for calculations.
1. Which subatomic particles are found in the nucleus of an atom?
Electrons and Protons
Protons and Neutrons
Electrons and Neutrons
Only Protons
2. What is an isotope?
Atoms with different numbers of electrons
Atoms with different numbers of protons
Atoms of the same element with different numbers of neutrons
Atoms of different elements with the same atomic mass
3. The strong nuclear force holds the and together in the nucleus.
4. Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting .
5. The half-life of a radioactive isotope is the time it takes for half of the radioactive to decay.
6. All isotopes of an element are radioactive.
True
False
7. Nuclear fission involves the splitting of a heavy atomic nucleus into two or more lighter nuclei.
True
False
8. Describe the main difference between alpha decay and beta decay.
9. Label the parts of the atomic nucleus shown in the diagram below.
A:
B:
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