http://www.ck12.org Chapter 5. Electrons in Atoms
Step 1: List the known quantities and plan the problem.
Known
- atomic number of carbon,Z= 6
Use the sublevel energy ordering illustrated above (Figure5.19) to draw an orbital filling diagram with a total of
six electrons. Follow Hund’s rule. Write the electron configuration.
Step 2: Construct a diagram.
- Orbital filling diagram:
- Electron configuration: 1s^22 s^22 p^2
Step 3: Think about your result.
After the 2ssublevel is filled, the 2psublevel is the next lowest in energy. psublevels always consist of three
orbitals, and all three orbitals need to be drawn, even if one or more is unoccupied. According to Hund’s rule, the
sixth electron is placed in the secondporbital and exhibits the same direction of spin as the fifth electron.
You can watch video lectures on this topic from Khan Academy:
- Introduction to Orbitals at http://www.youtube.com/watch?v=yBrp8uvNAhI (13:38)
MEDIA
Click image to the left for more content.- More on Orbitals and Electron Configuration at http://www.youtube.com/watch?v=FmQoSenbtnU (14:31)
MEDIA
Click image to the left for more content.- Electron Configurations at http://www.youtube.com/watch?v=RJlEH5Jz80w (10:04)