Doran

For a bonus point:
 * 1) History of the Atom (5pts)
 * Find out the important scientists who contributed to our current knowledge of the atom. Include:
 * A picture.
 * When they lived.
 * What they did.
 * Find out the important experiments that were used to make breakthrough discoveries.
 * Who perfomed these experiments?
 * Include years of each discovery/experiment so we can get an idea of how long this process has taken.
 * 1) Atomic Structure (5pts)
 * What are the different parts of the atom?
 * What are the different particles that make up the atom?
 * Where are they located?
 * What makes atoms of different elements different?
 * 1) Add an APPROPRIATE comment to someone's page through the discussion tab.

Scientists- Thales, John Dalton Thales Thales was born in Miletus, Asia Minor in 624 BC, but he moved to ancient Greece. Thales was an engineer, scientist, mathematician, and philosopher. He is often credited with introducing abstract geometry to the world. Thales learned that by rubbing a piece of amber with fur, he could attract hair and feathers to it. [] []

John Dalton John Dalton was born on September 6, 1766 in Eaglesfield, Cumberland, England. Early on, Dalton was a teacher and public lecturer. He became interested in much more advanced subjects after taking a teaching position in Manchester. John Dalton had an interest in meteorology, keeping weather records from 1787 until his death in 1844. Dalton concluded that air was not a vast chemical solvent, but instead a complex system of pressure and gasses. This led to Dalton calculating atomic weights using a system to determine the likely chemical compound of each element. [] []

Important Experiments With Atoms

Ernest Rutherford conducted a very important and well known experiment involving trying to shoot a narrow beam of alpha particles through a thin sheet of gold. Along with his assistant, Hans Geiger, Rutherford discovered that some particles shot back off of the sheet of gold, which he compared to a naval shell bouncing off of a piece of tissue paper. Rutherford conducted this experiment in Manchester, starting in 1907. He was awarded the Nobel Prize in 1908. [] []

J.J. Thomson was another important man in the history of the atom. Thomson, another Nobel Prize winner (1906 in Physics), among many other achievements, discovered a way to separate atoms and molecules using positive rays. In 1897, Thomson was experimenting with currents of electricity and empty glass tubes. The point of his experiment was to gain knowlege on a mysterious thing known as cathode rays. After these experiments, Thomson concluded that cathode rays are made up of things smaller than atoms, known as 'corpuscles'. [] []

An atom has three parts: electrons, neutrons, and protons. []

It is made up of sub-atomic particles (electrons, neutrons, and protons). Protons and neutrons are in the nucleus, which is surrounded by orbiting electrons. [] The number of protons in an atom is what makes it different from another atom. []