| A | B |
|---|
| Joule | discovered that energy is related to heat |
| Lavoisier | did experiments to prove law of con of matter |
| Newlands | presented another way to classify and organize elements, created octat rule |
| Plank | made constant |
| Goldstein Bohr | postulated that to get spectral lines, the energy of the electron in the atom must be quantized |
| Dalton | created atomic theory of matter |
| Democritius | proposed all matter that makes up the world is composed of tiny particles (atoms) |
| Einstein | created photoelectric effect |
| Mendeleev | made periodic table, predicted existance of new elements |
| Faraday | made discoveries that led to invention of electric motor |
| Millikan | oil droplets, fall between electrically plates, |
| de Broglie | reasoned that particles of matter should behave like waves and exhibit a wavelength |
| Mosely | developed atomic number and periodic law |
| J.J Thompson | cathrode ray design |
| Becquerel | uranium sample, on film, discovered radioactivity |
| Proust | found that a given compound always contains same elements in the same proportions by mass |
| Rutherford | designed gold foil experiment, alpha particles pass through foil, scatters in different directions |
| Curie | discovered radium |
| Law of conservation of Matter | matternetiher created nor destroyed in any process |
| Law of conservation of energy | energy is created nor destroied in any process |
| law of conservation of mass | mass is created nor ddestroied in any process |
| hunds rule | electron's occupy equal energy orbitals so that a max # of unpaired electrons results |
| periodic law | when elements are arranged in order of increasing atomic number their physical and chemical properties shown a periodic pattern |
| Aufbau principle | electron's added one at a time starting at lowest energy level |
| pauli Principle | 1 orbital=2 electrons |
| Uncertainity principle | position and the momentum of a moving object can't simulateulousy be measured and known exactly |
