Electron Configuration Worksheet
A Grade 10 Science worksheet covering electron configuration, orbitals, and quantum numbers.
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Electron Configuration Worksheet
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. Which principle states that each electron occupies the lowest energy orbital available?
Hund's Rule
Pauli Exclusion Principle
Aufbau Principle
Heisenberg Uncertainty Principle
2. How many electrons can a single atomic orbital hold?
1
2
6
8
3. The image above represents the electron cloud model of an atom. Which statement best describes an electron cloud?
A fixed path where electrons orbit the nucleus.
A region around the nucleus where electrons are most likely to be found.
The nucleus of an atom.
A cloud of protons and neutrons.
4. The letter 's' in 's-orbital' stands for .
5. The maximum number of electrons in the third energy level (n=3) is .
6. Write the full electron configuration for Oxygen (atomic number 8).
7. Explain the difference between an orbital and an electron shell.
Match the term to its definition.
8. Pauli Exclusion Principle
a. States that electrons fill degenerate orbitals singularly before pairing up.
9. Hund's Rule
b. No two electrons in an atom can have the same set of four quantum numbers.
10. Valence Electrons
c. Electrons in the outermost shell of an atom.