Other+Scientists

Democritus
[] Summarize his theory of the atom. Democritus' theory of the atom is very similar to what we know about the atom today but its much simpler.democritus asked the question, "if you break a piece of matter in half, and then you break it in half aagin, how many breaks will you have to make before you cant break it any further?" Democritus and his partner Leucippus came up with a theory. The theory of Democritus and Leucippus stated that everything is made of atoms, which are the smallest particles and cannot be divided. They also said that between atoms there is empty space, that atoms are not able to be destroyed, and that atoms always were and will be in motion. Also, that there is an infinite number of atoms which differ in shape and size. <=============== Democritus' atomic model

Who were his critics and what theories were postulated to challenge his? Aristotle, an influential philosopher, tried to disproove Democritus' theory. Aristotle had said that Democritus' theory was worthless. Answer: James Chadwick designed an experiment and proved Neutrons exist.

Why did it take so long to make this discovery? Answer: Protons, Electrons and Neutrons weren't discovered until 1920

Louis DeBroglie [|http://www.kentchemistry.com/links/AtomicStructure/wavesElectrons.htm] Explain his contribution to the wave-particle duality theory.

Robert Millikan [|http://www.kentchemistry.com/links/AtomicStructure/Millikan.htm] Millikan’s major contribution was to use an electric field to determine the charge on oil droplets in mechanical equilibrium. Watch the video that animates the Oil Drop Experiment. Let’s pretend that you have to explain what happened in this experiment to a class of fourth graders. How did the experiment work and what did Millikan find out? You cannot use any big fancy words!!!

In the oil drop experiment Milikan uses like a perfume bottler with a puffy ball. He puts that on a cylander which is box like. He also puts a microscope on it. He uses this to find out the max speed of what he squirts out of the perfume ball which is the oil. In the cylander he has 2 plates the top one with an opening space the other closed. At the bottom of the cylander there's an x-ray. Then the batteries are connected to each plate. After that he kept changing the power of the batteries to see oil go up after falling called the suspend. He then did an equation of the oil waight that is mass x gravity. That's how he found the suspend. He did the oil going up as charge x electrical field strenth, His final answer was that the electron chage= 1.6x10 to the -19 power. Erwin Schrodinger and Werner Heisenberg [|http://www.kentchemistry.com/links/AtomicStructure/schrodinger.htm] State Heisenberg’s Uncertainty Principle.  Heisenberg's *Heisenberg's Uncertainly Principle states by precise inequalities that certain pairs of physical properties. For example, position and momentum cannot be known to arbitrarily high precision, th the less precisely the other can be measured. measured.

He Schrodinger discovered the equation to determine the probability of an electron's location. *He figured out that the electrons moved in orbitals around the nucleus.  *Since it's not possible to find the exact location and the velocity of the electron, the Heisenberg's Uncertainly Principle, generates a field of probability in which is the shape of the orbitals in an atom.
 * Explain Schrodinger’s contribution to the model of the atom. **

Find visuals that show what Schrodinger’s s, p, d, and f energy sublevels look like.