Electron Configuration and Quantum Numbers
A Grade 12 Chemistry worksheet covering electron configurations, quantum numbers, and related principles.
Includes
Standards
Topics
Electron Configuration & Quantum Numbers
Name:
Date:
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Read each question carefully and provide the best answer based on your knowledge of electron configurations and quantum numbers. Show all work where applicable.
1. Which of the following principles states that no two electrons in the same atom can have identical values for all four quantum numbers?
Hund's Rule
Aufbau Principle
Pauli Exclusion Principle
Heisenberg Uncertainty Principle
2. What is the maximum number of electrons that can occupy the third principal energy level (n=3)?
2
8
18
32
3. The quantum number describes the orientation of an orbital in space.
4. For a d subshell, the possible values for the magnetic quantum number (m_l) are .
5. An electron in an atom occupies the lowest energy orbital that can receive it, according to the principle.
6. Write the complete electron configuration for a neutral atom of Sulfur (S).
7. Determine the four quantum numbers (n, l, m_l, m_s) for the last electron added to an atom of Oxygen (O) in its ground state.
8. All electrons in a p subshell have the same principal quantum number.
True
False
9. The diagram below illustrates the electron cloud model of an atom. Briefly explain what the 'electron cloud' represents.
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