Science project

Electron Charge Density

Research Questions:

  • Do you think that the darts will be closer to the center or will they be more spread apart on the outer rings? Explain.
  • Is it possible to determine which ring will be hit with an educated guess? Explain.
  • Do you think that this experiment correctly simulates the placement of electrons in their appropriate electron clouds?


  • Target with ten rings
  • Masking tape
  • Cardboard
  • Pen
  • Any number of darts

Experimental Procedure:

  1. Tape the target onto the cardboard.
  2. Tape the cardboard onto the floor.
  3. Stand on a chair and throw the darts one at a time.
  4. Once all your darts have run out, use the pen to mark the spots where your darts hit. If any of the darts are not in the rings, that dart will not count.
  5. Repeat steps 3-4 until you have thrown 100 darts.
  6. Use the chart shown below to record where your darts have landed: Ring Number Center 1 2 3 4 5 6 7 8 Darts Hit Note: You may not have to use all spaces in the chart, or you may need more spaces depending on what kind of target you use.
  7. After recording all of the data, look back on the research questions and think about them once again. Have your answers changed now?

Terms/Concepts: electrons, Heisenberg Uncertainty Principle, probability


Heisenberg Uncertainty Principle:

Electron Clouds:

Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items