Dr. Gutow's Atomic Orbital Viewer
Atomic orbitals on Kr Atomic orbitals on Cl
Hosted by UW Oshkosh Chemistry
Visualization of atomic orbitals on Cl atom

This page is designed to allow you to manipulate images of atomic orbitals and compare multiple orbitals (up to four) by displaying them simultaneously on one atom. The goal is to help you visualize atomic orbitals and their relative sizes.

You will notice that these orbitals look somewhat different from the orbitals on a one electron hydrogen atom. Generally, orbitals in many electron atoms appear to be somewhat more squat than the equivalent hydrogen atom orbitals. As the nuclear charge increases orbitals also get more compact. This is expected because of the increased electrostatic attraction between the nucleus and each electron.

Below (you may need to scroll down) is a box with a green dot in it. The green dot represents the location of a chlorine nucleus (significantly enlarged so that you can see it). To the right (or below on a narrow screen) are dropdown selectors from which you can choose an orbital to display and control the appearance of each orbital. The orbitals appear in the dropdowns in the order orbitals are filled when assigning configurations using the periodic table: lowest energy (at top) to highest energy (at bottom).

The electronic configuration of a ground state chlorine is [Ne]3s23p5 (1s22s22p63s23p5).  This means that the 4s, 3d and 4p orbitals shown are unoccupied;  thus their extent and energy are somewhat different than would be found for orbitals with electrons in them.

 
Orbital 1:
Orbital 2:
Orbital 3:
Orbital 4:
  • Viewer Instructions

    You can interact with the image. It is displayed using JSmol.
    Rotate the image Hold down the mouse button and drag the cursor over the image.
    Zoom the view Hold down the shift key and the mouse button while dragging up or down over the image. On a touchpad two finger drag-up zooms in.
    Many more options in the right-click menu The right-click menu can also be activated by clicking on the JSmol icon at the lower right of the viewer.

    Additional instructions for the viewer.
  • Other visualizations and explanations of atomic orbitals

  • How these orbital images are generated

    These orbital images are based on calculations done using the GAMESS1 ab initio quantum mechanics package. These images are generated on the fly by JSmol/Jmol from the GAMESS.log file of a restricted open shell Hartree-Fock (ROHF) single point energy calculation on a ground state Cl using the aug-CC-pVDZ basis set. The computations were done on computer resources and using software maintained by chemcompute.org.2 To aid in visualizing the full shapes of the unoccupied orbitals the orbital volumes encompass 96% probability of finding the electron, rather than the more common 90% - 95%. This makes the extent of the orbitals somewhat larger than the more common choice.
  • References

    1. M.W.Schmidt, K.K.Baldridge, J.A.Boatz, S.T.Elbert, M.S.Gordon, J.H.Jensen, S.Koseki, N.Matsunaga, K.A.Nguyen, S.Su, T.L.Windus, M.Dupuis, J.A.Montgomery J. Comput. Chem., 14, 1347-1363(1993).
    2. Perri, M. J. and S. H. Weber (2014). "Web-Based Job Submission Interface for the GAMESS Computational Chemistry Program." Journal of Chemical Education 91(12): 2206-2208. (doi:10.1021/ed5004228). These resources have been supported by the NSF through grants 2417553 (chemcompute.org) and ACI-1548562 (XSEDE).
Last Update: October 23, 2026
Expires: --
J. Gutow