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Atomic Structure Period 2

 

Scientist's Name Links Picture of Scientist Diagram of Atomic Model Voki of Scientist
Voki Text

John Dalton

 

http://fur.ly/24v5 John Dalton  

Hello, I am John Dalton and I lived in England from 1766 to 1844. I was a schoolteacher during my life but I also was a chemist. I created the 4 part atomic theory. The theory stated all elements are composed of tiny particles named atoms. Atoms of the same element are the same. The atoms of different elements can be physically together but never chemically combined. The 4th part states that chemical reations occur when atoms combine, separate, join or rearranged. My model of the atom is simply a whole indestructible particle with no internal structure. This model is no longer accepted.

 

 

 

Scientist's Name Links Picture of Scientist Diagram of Scientist's Work/Experiment Diagram of Atomic Model Voki of Scientist
Voki Text
J.J. Thomson http://fur.ly/24ya

Hello, my name is J.J. Thompson. I was born in the great country of England in 1856. I, J.J., won a Nobel Prize for discovering the electron through my invention of the cathode ray through gases at low pressure. In 1897, I sealed gases in a glass tube fitted at both ends with metal disks. The metal disks, or electrodes, were connected to a source of electricity. I believed that the atom was like raisin bread, so it was sometimes referred to as the raisin bread or plum pudding model. My beliefs were in fact accepted by society. Cheerio! Thanks for stopping by!

 

 

 

Scientist's Name  Links  Picture of Scientist  Diagram of Scientist's Work/Experiment Diagram of Atomic Model Voki of Scientist
Voki Text
Ernest Rutherford

http://fur.ly/24ye

http://www.chemheritage.org/

discover/chemistry-in-history/themes/atomic-and-nuclear-structure/rutherford.aspx

 Photo: Ernest Rutherford Milford Sound in New Zealand  Milford Sound in New Zealand    My name is Ernest Rutherford. I was born on August 30, 1871 in Nelson, New Zealand. After the discovery of radiation in 1896 by Becquerel, I identified the 3 main components of radiation and I named them alpha, beta, and gamma rays. This lead me to believe that an atom contained a small, dense, positively charge nucleus which is surrounded by a negatively charged electron cloud in 1911 when I conducted the Gold Foil experiment, which took massive alpha particles and directed them at a sheet of gold foil. Later on, in 1919, I conducted the most important experiment of my career: the first transumation. I bombarded Nitrogen gas with alpha particles to produce an unstable Fluorine isotope. The Fluorine isotope quickly decomposed into a stable oxygen isotope and a proton. This lead to the discovery of protons. I merely believed that it was a Hydrogen ion. My theory of atomic structure was accepted by the scientific community and even after my death on October 19, 1937, my ideas are still accepted today. I was the 1908 Nobel Prize in Chemistry and knighted in 1914.  

 

 

 

Scientist's Name  Links  Picture of Scientist  Diagram of Scientist's Work/Experiment Diagram of Atomic Model Voki of Scientist
Voki Text
Niels Bohr http://fur.ly/24yi

 

https://reich-chemistr

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NielsBohr1.jpg/14671

2247/NielsBohr1.jpg

 The electron emits or absorbs the energy changing the orbitshttp://library.thinkquest.org/19662/images/eng/pages/model-bohr-2.jpg

 See full size image

 www.tutorvista.com/.../niels-bohr-atomic-theory

  Hello, my name is Niels Bohr and I was a scientist in the early 1900's. I was born in 1885 in Copenhagen, Denmark. In 1922, I recieved a Noble Prize in Physics. I contributed to the understanding of the atomic structure. The model I made was a diagram of it. It showed energy being passed through each of the fixed energy levels. It represents the electrons emit or absorbs the energy changing in the structure.

 

 

 

Model Links  Picture of Scientist  Diagram of Scientist's Work/Experiment Diagram of Atomic Model Voki of Scientist
Voki Text
Electron Cloud  http://fur.ly/2557
     The Cloud model (5k)   My name is  Erwin Schrodinger. I was born in Austria on August 12, 1887. My work was done from the 1920's until the 1940's. I determined it is impossible to tell where an electron is. My work was used by Louis de Broglie and Werner Heisenberg. de Broglie suggested thet electrons, like light, behaved as a wave Heisenburg came up with the uncertainty principle, which states that electrons can't be seen with light and then predicted to be in a certain area. I wrote all the functions for the experiment, and discovered the orbitals and density clouds. The cloud model shows that electrons will be in a radius around the nucleus but not in a certain defined area.

 

 

 

Scientist's Name  Links  Picture of Scientist  Diagram of Scientist's Work/Experiment Diagram of Atomic Model Voki of Scientist
Voki Text
James Chadwick

http://fur.ly/17xd 
http://nobelprize.org/nobel_prizes/physics/laureates/1935/chadwick-bio.html

http://www.thocp.net/biographies/chadwick_james.htm

http://www.pbs.org/wgbh/aso/databank/entries/dp32ne.html

 

James Chadwick

 

 

 

http://wpcontent.answcdn.com/

wikipedia/commons/thumb/5/57/Li6-D_Reaction.svg/300px-Li6-D_Reaction.svg.png 

See full size image

Hello, my name is Jams Chadwick. I was born in Cheshire, England on October 20, 1891. I proved that the existence of neutrons in contrast with the helium nuclei. The helium nuclei is charged, and is therefore repelled by the considerable electrical forces present in the nuclei of heavy atoms. This new tool in atomic disintegration need not overcome any electric barrier and is capable of penetrating and splitting the nuclei of even the heaviest elements.This was the first artificial nuclear transformation.

 

 

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