scientists ch 4
About this set
Created by:
rachelll519 on October 26, 2009
Subjects:
science, scientists, chemistry
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15 terms
Basque | English |
|---|---|
| Rutherford |  discovered nucleus had positive charge- protons. did gold foil experiment |
| William Thomson | first to state that electrons are building blocks of atoms |
| J.J. Thomson | discovered isotopes and electrons. plum pudding model |
| Curie | bombarded atoms w/ alpha particles, and noticed beam of radiation. The beam had no charge, and the molecules had mass |
| Chadwick | interpreted Curie's idea and called them neutrons |
| Bohr | model later proved wrong by Heisenberg. planetary model- said that electrons move around the nucleus in energy levels and its called the planetary model because the e- orbit the nucleus like the planets orbit the sun |
| Heisenberg | uncertainty principle- you can pinpoint speed or location of electrons but not both at the same time |
| Planck | quantum theory- e=hv. figured out that electron magnetic energy is quantized for a given frequency of radiation (or light) |
| Millikan | accurately discovered charge of an electron |
| Hund's rule | each orbital in a sub level is filled singlely before it doubles |
| Schrodinger & Broglie | wave/mechanical model and discovered orbitals |
| Dalton | discovered atomic theory: elements made of atoms, compounds 2+ different atoms, atoms cant be destroyed, same atoms are same. |
| plum pudding model | the model of the atom created by JJ Thomson, consists of electrons on the surface of a positively charged sphere |
| gold foil experiment | Rutherford's experiment involving shooting alpha particles at gold foil and observing them going through and bouncing off determining that the nucleus of an atom has a positive charge |
| wave mechanical model | path of electron in hydrogen atom cannot be determined precisely but probably, like fireflies flying around a room |
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