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Atomic Models: The Advantages and Disadvantages of Diagramming Atoms

Explore the benefits and limitations of using atomic diagrams to visualize atoms in two dimensions. Learn about electron energy levels, guidelines for atom diagramming, and the misconceptions to avoid. Understand the truth behind the representation of protons, neutrons, and electrons in atoms to build a solid foundation in atomic models.

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Atomic Models: The Advantages and Disadvantages of Diagramming Atoms

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  1. Introduction to Atomic Models: Diagramming the Atom http://education.jlab.org/qa/atom_model_04.gif

  2. Advantages of the Atomic Diagram: • 2 Dimensional – can easily show on a piece of paper • Electron energy levels can be shown with rings – closer to nucleus means lower energy electrons • Conventionally (traditionally) used – so understood worldwide • Easily identifies an atom by clearly showing protons, neutrons & electrons

  3. Disadvantages of the Atomic Diagram: Truth: Electrons move around in space, but not along a specific path! • Not 3 Dimensional – can’t easily understand the space used • Rings for electrons can lead to the misconception that electrons have an orbital path • Nucleus appears to take up more space than it actually does Truth: Nucleus is less than 1% of total volume of an atom!

  4. Guidelines for Diagramming Atoms: • Before beginning: Determine the number of protons, neutrons, and electrons that are found in that atom. http://lifesciencereality.files.wordpress.com/2008/06/atom.jpg

  5. 2. “Rules” about electron energy levels: • Lowest electron energy level is closest to the nucleus. • Electron energy level increases moving away from the nucleus. • Electron energy levels can only hold a certain number of electrons. • Sometimes, electron energy levels can overlap. • Electron energy levels fill up starting with the lowest energy level first.

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