Examine the history of the development of the atom. We have already discussed the major players in the development of the atom. Pick out at least 8 major players who helped aid in the development of the concept of the atom. Explain each experiment in a concise explanation. Then explain how each one aided in the development of the next or how their concept assisted in the further development of the current quantum model of the atom.
Democritus - (460 B.C.) that everything is composed of "atoms", which are physically, but not geometrically, indivisible. He tested how many times could you physically break something down till it was impossible to break down any more. The Democritean atom is an inert solid that interacts with other atoms mechanically.
Lavoisier- He was intrigued by Democritus’ findings and began looking with more detail at the atom. He is credited with the defining elements. He made the first example of a heliostat, which was used to capture sunlight
John Dalton- He introduced the atomic theory. (All matter is composed of atoms) (Atoms of the same element are alike in weight and other properties, atoms of
different elements are different in weight and other properties.)(Compounds are formed fromed by the union of separation of definite number of atoms.)(Atoms do not divide in chemical reactions; only whole atoms unite with other other
atoms.)
J.J. Thomson- Looked more into Daltons’ theory, and cathode rays. He found that these rays are streams of particles much smaller than atoms, they are tiny pieces of atoms. The rays are made up of electrons.
Ernest Rutherford- He researched radioactivity with his gold foil experiment. He shot alpha particles at a sheet of gold and realized that some alpha particles bounced back and others did not, and he thought there must be some kind of small particle or nucleus .
Marie Curie- She studied Uranium and Thorium and called there spontaneous decay Radioactivity.
Neils Bohr- Came up with a structure for atoms. Devolped a structure of atoms that makes up the periodic table of elements.
Enrico Fermi- He made the first controlled chain reaction by releasing energy into the atoms nucleus.
I say, you have done a splendid job. The way that you have described this here atomic structure is superb. a job well done to you.
ReplyDeleteI would say each person is well described in how they contributed to the atomic theory, and i recommend that RoessBoss give you in a++ as she should give mine but i will be satisfied with a simple a.
this here comment was meant for todd.
ReplyDeleteRusty you did a great job describing the scientist, and how they contributed to the atom.
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