There are several "dudes," famous chemistry folks that students need to be familiar with. These dudes (Democritus, Dalton, JJ Thompson, Millikan, Rutherford, Bohr,
Heisenberg, De Broglie, and Planck) all did experiments and came up with
different and improved atom models. The current model is the elctron
cloud or quantum mechanical model which was formulated by Heisenberg and De Broglie.
Heisenberg & De Broglie came up with the current electron cloud model, but we draw
Bohr's planetary model the most often because it easier to count the
Electrons are tricky because they move constantly and
at high speeds. Heisenberg's Uncertainty Principle states that you
cannot know both the speed and location of an electron - you can only
know one - because measuring either one, changes the other. DeBroglie's wave theory helps explain why electrons sometimes act like particles and sometimes are compared to waves.
If you were absent for the Physical versus Chemical lab, you can make up the majority of it by following the link below and watching YouTube videos of the experiments. You can also just check them out because they are cool.
Open a link in a new tab. In the blue box, look for "Play Games" and "Scatter." You will then need to drag the names to the correct formula. If it disappears, you matched it correctly. Play each set a couple of times until you get really good. You can also use these as flashcards and make up and take tests.
Click on the rice above to test your knowledge of the Periodic Table while earning rice for the United Nations World Food Program. You can also test your knowledge of vocabulary as an excellent SAT prep.