College

Use the periodic table to determine the number of core and valence electrons for an oxygen atom. Provide your answer as a numerical response (1, 2, etc.) without units.

- Core electrons:
- Valence electrons:

Answer :

Final answer:

Oxygen has 2 core electrons and 6 valence electrons. The core electrons are found in the 1s shell, while the valence electrons are in the 2s and 2p shells. This arrangement helps explain oxygen's chemical bonding behavior.


Explanation:

Core and Valence Electrons of Oxygen


The oxygen atom has an atomic number of 8, which means it has 8 electrons. These electrons are arranged in energy levels around the nucleus. For oxygen, the electron configuration is 1s² 2s² 2p⁴.



  • Core Electrons: The innermost shell, represented by 1s², contains 2 electrons which are classified as core electrons.

  • Valence Electrons: The outer shell contains the 2s² 2p⁴ electrons, which adds up to 6 valence electrons.


In summary, for an oxygen atom:



  2. Core Electrons: 2

  4. Valence Electrons: 6


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