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Which subjectChemistry
What age groupYear or Grade 11
What topicElectron configuration
Question typesOpen-ended
Number of questions5
Number of answers4
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Chemistry Quiz: Electron Configuration

Instructions

Answer the following questions related to electron configuration. Each question is open-ended, and you should provide your answers clearly and concisely.

  1. Define electron configuration. What does it represent in relation to an atom?

  2. Using the noble gas notation, write the electron configuration for the element Argon (Ar).

  3. Identify the element that has the following electron configuration: [Kr] 5s² 4d¹⁰ 5p³. Provide its name and atomic number.

  4. Explain the significance of the Aufbau principle in determining the electron configuration of an atom.

  5. Describe the difference between the ground state and an excited state of an electron configuration. Provide an example of each.


Answer Key

For instructors, here are the key points to look for in the responses:

  1. A correct definition of electron configuration includes how it represents the distribution of electrons among the various orbitals of an atom.

  2. A correct electron configuration for Argon should be noted as [Ne] 3s² 3p⁶.

  3. The element that corresponds to the given electron configuration is Antimony (Sb), atomic number 51.

  4. An explanation of the Aufbau principle should include that it states electrons occupy the lowest-energy orbitals first when more than one orbital is available.

  5. The distinction should note that the ground state configuration is the lowest energy state for an atom, while an excited state configuration involves electrons in higher energy orbitals. Examples can include common elements like Hydrogen in its ground state (1s¹) and an excited state (for example, 2s¹).

Please ensure that students write clear, thoughtful answers to demonstrate their understanding of electron configurations.