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Thomson is most commonly known for his discovery of the electron. He developed his own experiment, using a cathode ray tube (abbreviated CRT), to find results. Created by hand, the CRT was approximately one meter. In 1897, he officially announced his discovery: the electron.
{Picture_1.png} Thomson's Cathode Ray Tube; http://www.chemteam.info/AtomicStructure/Disc-of-Electron-Images.html
His Experimental Processs
Thompson is most known for his disocvery of the electron, the negative charge within an atom, but how did he come about this with such limited technology?
It all statrted out in the Cavendish Laboratory at Cambridge University where he was conducting a routine experiment regarding electrical currents within a glass tube.
Through this experiment he was observing cathode rays but stumbled upon something else; the proposal that the myeterious cathode rays were streams of particles even smaller than atoms.
In fact, they were small pieces of atoms or as he called them, "corpuscles" which made up the matter of an atom. This idea puzzled most people because the atom was always identified as the smallest
piece of matter but Thompson proved them all wrong. With this discovery came the electron we all know and study today.
This is a video explaining, more in detail, the experiment Thompson conducted.
http://www.youtube.com/watch?v=YTAC1wMrVPk
{http://www.daviddarling.info/images/electron_capture.jpg}
References:
http://www.aip.org/history/electron/jjthomson.htm
http://www.nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html
http://www.chemteam.info/AtomicStructure/Disc-of-Electron-Images.html
References(Kiernan):
http://www.aip.org/history/electron/jjhome.htm
http://www.aip.org/history/electron/jjrays.htm
http://www.google.com/search?tbm=isch&hl=en&source=hp&biw=1187&bih=526&q=electron&gbv=2&oq=electron
6. Robert Millikan
(Gabby)

Bohr's Atom:
{http://cdn.inquisitr.com/wp-content/2011/09/Solar-System-As-It-Stands-Now.jpg}
orbit it.
Based on Rutherford's atom electrons are supposed to be circling the nucleus, the laws of physics state that they will circle closer and closer and eventually slow down and eventually crash into the nucleus.
Bohr's model can be compared to the rungs of a ladder, when you are standing on a ladder your feet are on one rung or another. The amount of potential energy that you have is equal to standing on the first rung of a ladder, the second and etc..... Your energy can't correspond to standing between two rungs because you are not able to stand in mid-air. Equal to this is an election can be in one orbit or another, not in between two. While in a given orbit, the electron is NEITHER gaining or losing energy. When a electron falls in a lower energy level, a photon ( a quantum of electromagnetic radiation) is emitted and this process is called emission.
emitted radiation.
Structure of the Atom: CLICK HERE FOR VIDEO!!!
Works Cited:
11. Chadwick:
{Chadwick2.png}
Physics in 1935.)1935.
References:
1. http://www.wired.com/science/discoveries/news/2009/02/dayintech_0227
2. http://www.light-science.com/chadwick.html

Bohr's Atom:
{http://cdn.inquisitr.com/wp-content/2011/09/Solar-System-As-It-Stands-Now.jpg}
orbit it.
Structure
Based on Rutherford's atom electrons are supposed to be circling the nucleus, the laws of physics state that they will circle closer and closer and eventually slow down and eventually crash into the nucleus.
Bohr's model can be compared to the rungs of a ladder, when you are standing on a ladder your feet are on one rung or another. The amount of potential energy that you have is equal to standing on the first rung of a ladder, the second and etc..... Your energy can't correspond to standing between two rungs because you are not able to stand in mid-air. Equal to this is an election can be in one orbit or another, not in between two. While in a given orbit, the electron is NEITHER gaining or losing energy. When a electron falls in a lower energy level, a photon ( a quantum of electromagnetic radiation) is emitted and this process is called emission.
Energy must be added to an atom in order to move a electron from a lower energy level to a great energy level, this process is called absorption. The energy of each absorbed or emitted photon communicates to a particular frequency of emitted radiation.
Structure of the AtomAtom: CLICK HERE FOR VIDEO!!!
Works Cited:
"Bohr, Niels - The Free Information Society." The Free Information Society - Educating and Entertaining since 2003. Web. 30 Nov. 2011. <http://www.freeinfosociety.com/article.php?id=95>.
Davis, Raymond E. "Chapter 4." Modern Chemistry. USA: Holt, Rubegart and Winston, 2006. 102. Print.
"A Planetray Modle of the Atom." The Borh Modle. Web. 1 Dec. 2011.
"Bohr Model." Weblog post. Wikipedia, the Free Encyclopedia. Web. 01 Dec. 2011. http://en.wikipedia.org/wiki/Bohr_model.

By Sara S.
3. Antoine Lavoisier
(By Amber)
{Antoine-Lavoisier.jpg} Antoine Lavoisier
Background:
His Lab and Tools
Lavoisier’s lab was filled with costly apparatus’ and chemicals.His apparatus' and chemicals were located in his home because he didn't have a lab.
{lavoisier_lab.jpg} Lavoisier's LbaLab
Sources:
http://www.greatscientists.net/antoine-lavoisier/

By Sara S.
3. Antoine Lavoisier
(By Amber)
{Antoine-Lavoisier.jpg} Antoine Lavoisier
Background:
Lavoisier’s lab was filled with costly apparatus’ and chemicals.His apparatus' and chemicals were located in his home because he didn't have a lab.
{lavoisier_lab.jpg} Lavoisier's Lba
Sources:
http://www.greatscientists.net/antoine-lavoisier/
http://www.antoine-lavoisier.com/antoine_lavoiser-works_001.htm
http://www.humantouchofchemistry.com/antoinelaurent-de-lavoisier.htm
http://www.firstscience.com/home/articles/big-theories/can-science-reveal-the-truth-page-1-1_60242.html
http://www.chemheritage.org/discover/magazine/articles/26-1-revolutionary-instruments.aspx
http://bobarnebeck.com/ch1.html
http://www.famous-scientists.net/antoine-laurent-lavoisier.htm
http://www.lycos.com/info/antoine-lavoisier--experiments.html
4. John Dalton
(by Vicky, Brenna, and Alisa)

References:
http://www.nobelprize.org/nobel_prizes/physics/laureates/1923/millikan-bio.html
http://scientistsinformation.blogspot.com/2011/02/robert-millikan-1868-1953.htmlhttp://scientistsinformation.blogspot.com/2011/02/robert-millikan-1868-1953.ht
7. Ernest Rutherford (Camille and Rachel)
{http://listverse.files.wordpress.com/2009/02/ernest-rutherford-tm.jpg?w=259&h=350&h=350}
http://abhinandkr.wordpress.com/2010/12/25/all-science-is-either-physics-or-stamp-collecting/Ernest Rutherfordhttp://abhinandkr.wordpress.com/2010/12/25/all-science-is-either-physics-or-stamp-collecting/
Background Information
Ernest Rutherford was born in New Zealand on August 30,1871. He was the fourth child of twelve, with six brothers and five sisters. His father, James Rutherford, was a Scottish wheelwright, and his mother, Martha Thompson, was an English school teacher. Rutherford graduated Canterbury College in 1893 with Masters Degree in Mathematics and Physical Science. Rutherford was awarded the Rumford Metal in 1903, and was president of the Royal Society from 1925-1930.
Rutherford discovered that atoms are made up of negative and positive charges, and proposed that these formed a sold mass. He also discovered that a large positive charge was located at the center of the atom, called the nucleus. The negative charges, called electrons, are distributed throughout the rest of the outside space of an atom.
{http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/images/Rutherford-atom.jpg} Rutherford's Atom
Rutherford's view of an atom derived from his gold foil experiment. After the experiment he created the "planetary model of the atom". In this model he puts all the protons in the nucleus while the electrons were around the nucleus. This is a planetary model because it is similar to the way the planets orbit around the sun.
http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/rutherford-model.html
His Experiment
{http://web.neo.edu/rjones/Pages/1014new/Lecture/chemistry/chapter_8/images/scatter1.gif} http://web.neo.edu/rjones/Pages/1014new/Lecture/chemistry/chapter_8/pages/history_of_atom.htmlRutherford's Gold Foil Experimenthttp://web.neo.edu/rjones/Pages/1014new/Lecture/chemistry/chapter_8/pages/history_of_atom.html
VIDEO: http://www.youtube.com/watch?v=5pZj0u_XMbc
Famous Quote:
"All science is either physics or stamp collecting."
http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html
http://web.neo.edu/rjones/Pages/1014new/Lecture/chemistry/chapter_8/pages/history_of_atom.html
http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/rutherford-model.html
8.Niels Bohr- by Caroline Caroline and Ana
{1186.jpeg} Background Information:

http://julesbright.com/wp-content/uploads/Alchemy.jpg
http://merovee.files.wordpress.com/2010/07/alchemy.jpg
By Sara S.
3. Antoine Lavoisier
{Antoine-Lavoisier.jpg} Antoine Lavoisier
Background:
mother's house.His auntbroughtaunt brought him and his love Marie-Anne,Marie-Anna, a smart of releasing phlogistonphlogiston, the rumored component of combustable substances, it actually oxygen. Thus discoveringLavoisier discovered the element of oxygen. He in about the year 1785. Lavoisier Modern Chemistry because he discovered oxygen and the law of conservation of mass. Marie-Anna is then considered the of all that they did and discovered.the help she gave to her husband in his studies.
{lavoisier_experiment.jpg} Lavoisier's the burning processScienceprocess {28-1-FEA-Lavoisier-couple.jpg} Lavoiser and his wife, Marie-Anna
Science Career:
Law of Conservation of Mass
experimented on them.them and then compared the number and noticed the lack of a difference.
His Lab and Tools
Lavoisier’s lab was filled with costly apparatus’ and chemicals.His apparatus' and chemicals were located in his home because he didn't have a lab.
{lavoisier_lab.jpg} Lavoisier's Lba
4. John Dalton
(by Vicky, Brenna, and Alisa)