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Aristotle and Democritus
Democritus was born in Greece in 470 B.C and he lived until 380 B.C. This was literally the beginning of speculations about matter and Greece was the birthplace of these Ideas. Democritus believed that all matter was made of extremely tiny particles that couldnt be broken down further. Aristotle was born in 384 B.C and died in 322 B.C. Aristotles views were very controversial during his time and he rejected many of Democritus' views. Aristotle also did work with atoms in nature. -
Coulomb
Born in 1736, French physicist Charles Coulomb was born in France and he is known for Coulombs law. Coulombs law states that the force between two electrical charges is proportional. Coulombs force is a principal involved in atomic reactions. Coulomb was educated in Paris, and his family moved around a bit. Coulomb died on August 23 1806. The coulomb, which is a unit of electric charge, was named after him. -
John Dalton
John Dalton was born in 1766 in England. He was an english chemist, meteorologist, and physicist. Dalton was a very accomplished man who ended up winning the Royal Medal Award. His theory presented many new ideas: Atoms cant be created or destroyed, All atoms of the same element are identical, different elements have different atoms, chemical reactions happen when atoms are rearranged, and all matter is composed of atoms. As you can see he showed us a lot. He conducted experiments on gases. -
Law of conservation of mass
The law of conservation of mass was created by French chemist Antoine Lavoisier. The law states that mass is not created or destroyed in a chemical reaction. -
Kelvin
William Thomson was born on June 26th, 1824. He was a physicist who was among a group of british scientist who helped make many discoveries. Thomson was the first scientist to suggest that there were mathematical analogies between many different kinds of energies. He had a lot of involvement in electricity, but also many other things. He was extremely smart, as he was an engineer and a mathematician. He is known for the kelvin,which is a unit of absolute temperature. He died on December 17,1907 -
J.J Thomson
Joseph John Thomson was a physicist who lived in the U.K, and won the nobel prize in physics. He created the plum pudding model. He also discovered the electron. This is obviously a very significant discovery because electrons are essential in the world of science. He did an expirement with cathode rays passing through a vacuum, discovering that particles that made up gases were universal. He also proved the existence of isotopes in an expirement with neon. He died on August 30, 1940. -
Max Planck
Planck was a German physicist who originated the quantum theory. In 1918 he won the nobel prize in physics. Quantum theory revolutionized how scientists would go about things. The quantum theory is based on the fact that matter and energy have the properties of both particles and waves. Planck died on October 4, 1947. -
Ernest Rutherford
Rutherford was one of the key people in the world of science as he lead to the discovery of nuclear physics. He was also involved in radioactivity as he was one of the main members of this topic. He is also known for his gold foil expirement. This experiment was so important because it lead to the discovery of the nucleus. He eventually won the nobel prize in chemistry. He atended the University of New Zealand and later the university of manchester. Rutherford died october 19th, 1937. -
Albert Einstein
Einstein was a German scientist who attended the University of Zurich. He is probably one of the most famous scientists. He is known for the theory of relativity and also his involvement in the atom bomb. Einstein accomplished a lot and won the nobel prize in physics. He died on April 18, 1955. -
Bohr
Niels Bohr is a scientist mostly famous for the Bohr model. Bohr was a student of Ernest Rutherford, and he was a Danish physicist. He was also the first scientist to actually apply the quantum concept. Bohr proposed that electrons orbit around the nucleus and he also discovered energy levels. Bohr died on November 18 1962. -
Schrodinger
Erwin Schrodinger was an Austrian physicist who contributed to the idea of quantum mechanics. He also discovered the formula for quantum mechanics. He attended the university of vienna. Shroding was jewish and moved around Europe a lot because of the persecution of jews that was happening. Schrodinger died on January 4, 1961. -
Mosely
Henry Mosely was an english physicist who attended trinity college and oxford. Mosely lived in England and he was involved in the periodic table of elemnets. He expirementally showed that the periodic table should go in order by atomic number based on major properties of elements. Moseleys law was a key discovery in progressing the knoledge of the atom. Mosely died on August 10, 1915. He unfortunately died in his twenties. -
Uncertainty Principle
On December 5th, 1901 Werner Heisenberg was born. He developed the Uncertainty principle. This principle states that the exact position of a particle cant be accurately measured. -
Glenn Seaborg
Seaborg received his Ph.D in chemistry from the University of California. Seaborg lead to an update in the periodic table as he mad many new discoveries of elements. He was the co-discoverer of plutonium and all further transuranium elements through 102. He also conducted a lot of research on isotopes. He died on February 25, 1999. -
Neutron
In 1932 the neutron was discovered. It was discovered by James Chadwick. Many other scientists also contrbuted to the research of neutrons. One of the main reasons it was so long until neutrons were discovered is because they have a neutral charge.
