Set: Atomic Timeline Scientists

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All 20 Terms

Term Definition
Democritus A thought that all matter is made up of atoms
Henning Brand Discovered Phosphorus
John Dalton His work identified chemical elements as a specific type of atom
Count Amedeo Avogadro He is most noted for his contributions to the theory of molarity and molecular weight
Julius Plücker He made fundamental contributions to the field of analytical geometry and was a pioneer in the investigations of cathode rays that led eventually to the discovery of the electron
Dmitri Mendeleev Primary creator of the first Periodic Table of Elements
Sir William Crookes He was, as a consequence, one of the first scientists to investigate what are now called plasmas. He also devised one of the first instruments for the study of nuclear radioactivity, the spinthariscope. Crookes also identified the first known sample of helium.
Wilhelm Roentgen He produced and detected electromagnetic radiation in a wavelength range today known as x-rays or Röntgen rays
Henri Becquerel One of the discoverers of radioactivity
Pierre Curie The first to use the term "radioactivity, and was a pioneer in its study.
Ernest Marsdon Geiger And Marsdon did the gold foil experiment which discovered the atomic nucleus
Ernest Rutherford He pioneered the orbital theory of the atom.
Hans Geiger He is perhaps best-known as the co-inventor of the Geiger Counter and Geiger and Marsdon discovered of the atomic nucleus
Niels Bohr He made fundamental contributions to understanding atomic structure and quantum mechanics
Joseph Thompson He discovered of the electron , the isotopes and the invention of the mass spectrometer
Louis de Broglie De Broglie created a new field in physics, wave mechanics, uniting the physics of light and matter
James Chadwick Discovered the neutron
Irene Curie Discovered artificial radioactivity
Hideki Yukawa He published his theory of mesons, which explained the interaction between protons and neutrons, and was a major influence on research into elementary particles
Linus Pauling Elucidating the nature of chemical bonds and the structures of molecules. He came near to discovering the "double helix," the ultra structure of DNA

Set Information

Terms 20
Creator flynby99
Created October 14, 2007
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Most Missed Words

  1. Democritus → A thought that all matter is made up of atoms - 1 miss
  2. John Dalton → His work identified chemical elements as a specific type of atom - 1 miss
  3. Julius Plücker → He made fundamental contributions to the field of analytical geometry and was a pioneer in the investigations of cathode rays that led eventually to the discovery of the electron - 1 miss
  4. Sir William Crookes → He was, as a consequence, one of the first scientists to investigate what are now called plasmas. He also devised one of the first instruments for the study of nuclear radioactivity, the spinthariscope. Crookes also identified the first known sample of helium. - 1 miss
  5. Louis de Broglie → De Broglie created a new field in physics, wave mechanics, uniting the physics of light and matter - 1 miss