The History Of The Atom- Kristen Bastin & Anthony Blackwell

Aristotle BC

350

• he did not believe in the atomic theroy, believed that all things were made up of the four elements; fire, air, water, and earth -he also offered no proof Sources: "The Atom Timeline." Timetoast. N.p., n.d. Web. 26 Feb. 2014.

Democritus BC

460

• discovered the idea of "Atoms"- the smallest piece of matter
• called them "atomos" -stated they were infinite in number, always moving, and capable of joining together
• he offered no evidence to support his model(Lead to fact that he wasnt widely believed) Sources: "HISTORY OF THE ATOM FROM DEMOCRITUS TO BOHR AND SCHRÖDINGER." HISTORY OF THE ATOM FROM DEMOCRITUS TO BOHR AND SCHRÖDINGER. N.p., n.d. Web. 26 Feb. 2014 "History of Atoms." History of Atoms. N.p., n.d. Web. 28 Feb. 2014.

Dalton

Feb 28, 1803

-all matter is made of atoms
-all elements are made up of the same atom
-why everything has a fixed weight
-compounds are formed by combining two or more types of atoms
-gathered info from expirements
Sources:
"Dalton's Atomic Theory." Dalton's Atomic Theory. N.p., n.d. Web. 27 Feb. 2014.
Usselman, Melvyn C. "Dalton, John." World Book Advanced. World Book, 2014. Web. 26 Feb. 2014. http://www.worldbookonline.com/advanced/article?id=ar147100&st=dalton.

Dalton Extra Citation

Mar 6, 1803

"Glogster Home Page." Glogster. N.p., n.d. Web. 06 Mar. 2014.

thomson

Feb 28, 1897

-discovered electrons inside atoms
-added electrons to the model
-used experimentation methods while studing electric discharges with rays
Sources:
"Group5." 2011ModelsB -. N.p., n.d. Web. 06 Mar. 2014.
"A Brief History of Modern Atomic Theory." Chemistry Tutorial : History of Atomic Theory. N.p., n.d. Web. 26 Feb. 2014.
"History of Atoms." History of Atoms. N.p., n.d. Web. 28 Feb. 2014.

Rutherford

Mar 2, 1911

-Established nuclear model of atom
-Radioactive elements give off charges(alpha & beta)
-Saw how electrons were charged
-Showed Nuclear Structue of atoms
-Theory from observations/Evidence from experiments
Sources
"Ernest Rutherford." Homepage of the Chemical Heritage Foundation. Chemical Heritage Foundation, n.d. Web. 27 Feb. 2014.
"History of Atoms." History of Atoms. N.p., n.d. Web. 28 Feb. 2014.
Stuewer, Roger H. "Rutherford, Ernest." World Book Advanced. World Book, 2014. Web. 5 Mar. 2014

rutherford (Extra citations)

Mar 6, 1911

"Glogster Home Page." Glogster. N.p., n.d. Web. 06 Mar. 2014.

bohr

Mar 3, 1913

-electrons could only travel in larger(Successively) orbits around the nucleus
-how atoms emit radiation
incorporated quantom theory
Sources:
The Editors of Encyclopædia Britannica. "Bohr Atomic Model (physics)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 27 Feb. 2014.
"History of Atoms." History of Atoms. N.p., n.d. Web. 28 Feb.
2014
"Niels Bohr." Wikipedia. Wikipedia, n.d. Web. 6 Mar. 2014.

scrodinger

Mar 5, 1926

-wavelike behavior of atomic particles
-created "Schrodinger equation"
- based off ideas of other scientists
Sources:
Bernstein, Jeremy. "Erwin Schrodinger (Austrian Physicist)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 27 Feb. 2014.
Pesic, Peter. "Schrodinger, Erwin." World Book Advanced. World Book, 2014. Web. 5 Mar. 2014.
"Atom Jes." Mensa Australia. N.p., n.d. Web. 05 Mar. 2014.

Heisenberg

Mar 5, 1932

-discovered the neutron
-sowed proton and neurtron interaction
-used observation and experimentation
Sources:
"A Brief History of Modern Atomic Theory." Chemistry Tutorial : History of Atomic Theory. N.p., n.d. Web. 26 Feb. 2014.
Beyler, Richard. "Werner Heisenberg (German Physicist and Philosopher)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 27 Feb. 2014.
"Matter." Matter. N.p., n.d. Web. 05 Mar. 2014.