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Zenobia Minnigan and Nancy Armenta-Castelar Timeline
Transcript of Zenobia Minnigan and Nancy Armenta-Castelar Timeline
Born 460 B.C. 370 B.C
He was the first to use the term atom.
He was an influential pre-Socratic philosopher who formulated an atom theory for the cosmos.
He described the atom by mathematics of the day. J.J Thomson Robert Millikan Democritus Aristotle He lived in the heart of Greece (Athens).
Born 384 B.C. 322 B.C.
He defined matter as composed of hot, cold, wet and dry.
The properties related to fire, air, water, and earth.
He studied under Plato and later tutored Alexander the Great at the Macedonian court. In 335 B.C. he opened a school in the Athenian lyceum. He died in Chalcis, where he fled to after Alexander dearth. John Dalton He developed the first useful atomic theory of matter around 1803.
Born- September 6, 1766
Died- July 27, 1844
He developed the modern atomic theory.
He concluded that evaporated water exists in air as an independent gas.
He developed the hypothesis that the sizes of the particles making up different gases must be different. In 1897 in Cambridge, he experimented on cathode rays.
Born- December 18, 1856
Died- August 30, 1940
He showed that cathode rays were particles with a negative electric charge and much smaller than an atom.
He also though all atoms contained them.
These particles were later named electrons. He was an american physicist who awarded the Nobel Prize for physics and for his experiments on the photoelectric effect and on the charge carried by an electron.
Born- March 22, 1868
Died- in 1953
He is known for his studies of cosmic rays and his role in establishing the California Institute of Technology as a leading research establishment. Ernest Rutherford He is known for his discoveries of chemical relations between radioactive substances.
Born- August 30, 1871
Died- October 19, 1937
He is also known for his scattering of atom which is popularly known as Rutherford model which he achieved through his brilliant Rutherford scattering and gold foil experiment. James Chadwick In 1932, he discovered a previously unknown particle in the atomic nucleus.
Born- October 20, 1891
Died- July 24, 1974
The particle became known as the neutron because of its lack of electric charge.
The discovery was crucial for the fission of uranium 235.
his discovery made it possible to create elements heavier than uranium in the laboratory.
He was awarded the Hughes Medal of the Royal Society in 1932 and the Nobel Prize foe physics in 1935. Pierre and Marie Curie Marie Curie was the first women to win a Nobel Prize.
She was a polish physicist and chemist.
She made many discoveries that led to what we call modern medicine.
She was born in Poland
Born- November 7, 1867
Died- July 4, 1934
Together with her husband, Pierre, she discovered two new elements (radium and polonium). Niels Bohr He came up with the planetary model of the atom, also called the Bohr Model.
Born- October 7, 1885
Died- November 18, 1962
In the model, he shows that electrons travel in specified energy levels.
He also determined that spectrum lines are produced when electrons move.
He worked under Sir J.J Thomson in1911 then Professor Rutherford in 1912. Max Planck He was a German physicist who is considered to be the inventor of quantum theory.
Born- April 23, 1853
Died- October 4, 1974
In 1899, he discovered a new fundamental constant, which is named Planck's constant, and is, for example, used to calculate the energy of a photon.
One year later, he discovered the law of black body radiation. John Newlands John Alexander Reina Newlands was an English chemist who worked on the development of the Periodic Table.
Born- November 26, 1837
Died- July 29, 1898
He was the first person to devise a periodic table of elements arranged on order of their relative atomic weight.
In 1865 he published his law of octaves which stats that "any given elements will exhibit analogues behavior to the eighth element following it in the table. Dmitri Mendeleev Dmitri Lavanovich Mendeleev was a Russian chemist and inventor.
Born- February 8, 1834
Died- February 2, 1907
He published his work on the periodic table in the principles of chemistry in 1869.
He created the first version of the periodic table of elements, and use it to predict the properties of elements yet to be discovered. Citations "Pioneers in Optics." Molecular Expressions Science, Optics and You. Web. 1 Jan.
"Democritus, 1st Atomic Theory." Timeline Index. Web. 1 Jan.
"Aristotle, Greek Philosopher." Timeline Index. Web. 1 Jan.
"J.J Thomson, Discovers the Electron, 1897." Timeline Index. Web. 1 Jan.
John Dalton, First Useful Atomic Theory." Timeline Index. Web. 1 Jan.
"Ernest Rutherford Biography." The Famous People. Google, Web. 1 Jan.
"James Chadwick, Discovery Neutron." Timeline Index. Web. 1 Jan.
"Marie Curie Timeline." Softschools.com. Web. 1 Jan.
"Marie Curie 1867-1934." About.com. Web. 1 Jan.
"Niels Bohr-1912." Timeline of the Atom. Web. 1 Jan.
"Max Planck, Inventor of Quantum Theory." Timeline. Web. 1 Jan.
"John Alexander Reina Newlands." WIKIPEDIA, the free encyclopedia. Web. 1 Jan.
"Dmitri Mendeleev." WIKIPEDIA, the free encyclopdia. Web. 1 Jan.