CHEM 1211 - Scientists Flashcards
1
Q
Humphrey Davey
A
Ran electricity through compounds and noticed that they dissolved into their individual elements.
He noted that compounds are held together through electrical forces.
2
Q
Michael Faraday
A
Learned in 1832-1833 that the amount of reaction that occurs during electrolysis is proportional to the current passed through compounds.
3
Q
J.J. Thomson
A
- Considerded the scientist who discovered electrons.
- Discovered that electrons are negatively charged
- gave them the name “electrons”
4
Q
Eugene Goldstein
A
- Discovered positively charged subatomic particles in a cathode rays in 1886
- Father of the proton
5
Q
Robert A. Millikan
A
- Determined the charge and mass of the electron
- Famous for the “oil drop” experiment
6
Q
Ernest Rutherford
A
- Determined that the atom is mostly empty space around a dense center (gold foil experiment of 1912)
- Father of the nuclear atom (and the Rutherford model)
- Directed Hans Geiger and Ernst Marsden in the famous 1910 experiment
7
Q
H.G.J. Moseley
A
- Determined that the atomic number (number of protons) determines the element
8
Q
James Chadwick
A
- Discovered neutrons by noting alpha particle scatterings on thin Be films.
9
Q
Francis Aston
A
Created the first mass spectrometer
10
Q
Louis de Broglie
A
- Mentioned in his PhD dissertation that electrons have wave-like properties
- Came up with the de Broglie relationship:
11
Q
Werner Heisenberg
A
- Developed the Heisenberg uncertainty principle (you can’t know both the position AND momentum of a particle at the same time)
