https://padlet.com/csanadim19/nfkopa3zghpb By: Morgan Csanadi en-us 2016-09-16 18:58:07 UTC 2016-09-19 00:51:29 UTC hello@padlet.com csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124466830 -He contributed to the atomic theory around 400 B.C.
-Democritus contributed to the atomic theory by claiming that "the universe is composed of two elements." The two elements were the atoms and where the atoms moved. Democritus also stated that atoms were very, very small particles of matter.
-Democritus had no experiment, he came up with this philosophically, what led to his thinking was that he understood that nothing can be too big or too small. He soon realized everything was made up of something much smaller.
-There is not much to the diagram the sphere is simply just the atom. They didn't know the different parts  of the atom yet.

]]> 2016-09-16 19:07:25 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124466830 csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124541533 -Contributed to atomic theory in 1803
-Dalton stated that everything was made up of these "indestructible building blocks" and that all atoms of one element were the same but that different elements all had different atoms. Also that atoms can not be created or destroyed.
-The experiments that led Dalton to this theory were experimenting with gases that recently became possible in the nineteenth century. He then noticed that certain gases could only be combined with certain proportions. He studied his newest findings  and studied previously made laws such as "conservation of mass' and "law of definite proportions". He was able to create his new law, "the law of multiple proportions", his new law states, " if two elements can be combined to form a number of possible compounds, then the ratios of the masses of the second element, which combine with a fixed mass of the first element, will be ratios of small whole numbers." So this led him to the ratios of atomic weights that linked him to his final contribution to the atomic theory.
-Again like Democritus, there were no parts of the atom discovered yet so this is simply representing the known smallest particle in existence, the atom.

 ]]> 2016-09-18 02:42:14 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124541533 csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124541985 -Contributed to atomic theory in 1897
-Said that electrons made up an atom
-Discovered electrons by expirementing with a cathode ray and studied positively charged rays. Then he studied negative particles in neon. Then he created this model showing negative charges in an atom.
-He named it the "Plum Pudding" model because he though it looked like plum pudding. The negative electrons floating in the middle were like raisins and the pink part (dough) was the positive part.

]]> 2016-09-18 03:05:59 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124541985 csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124583991 -Contributed to atomic theory in 1911
-Rutherford discovered that there was a positively charged core of the atom and called it the nucleus. He said that the atom was mostly empty space. Named protons.
-He discovered this with his gold foil experiment where he shot particles at gold foil, some bounced off while some went through. This experiment actually proved his former teacher, J.J. Thompson wrong.
-In the diagram he shows the positive nucleus and the negative electrons flying around it.

]]> 2016-09-18 19:22:18 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124583991 csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124584443 -Contributed to the atomic theory in 1913
-He states that electrons move around the nucleus but only in confined orbits.
-Bohr had no experiment, he just studied the properties of atoms and created his theory based upon Rutherford's description of the nucleus and Planck's theory about quanta. He was able to state what happens inside an atom and developed a more accurate model.
-Everything in this models labelled parts is correct except the third shell should only have 8 electrons.

]]> 2016-09-18 19:30:14 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124584443 csanadim19 https://padlet.com/csanadim19/nfkopa3zghpb/wish/124585274 -Contributed in 1926
-He proposed that electrons will not be in one certain position, and will not stay in one certain position.
-No experiment done on this.
-This model consists of the nucleus being surrounded by electrons all in a different level of orbit.

]]> 2016-09-18 19:44:41 UTC https://padlet.com/csanadim19/nfkopa3zghpb/wish/124585274