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BJU Chem Test 4
| Question | Answer |
|---|---|
| first to refer to matter as being made up of discrete particles | Democritus |
| describes how any sample of water contains 8 g of oxygen for every 1g of hydrogen | law of definite composition |
| first model to include to include different masses of different elements | Dalton's model |
| Thomson's cathode rays were | electrons |
| subatomic particle with least mass | electrons |
| credited with the discovery of the neutron | James Chadwick |
| first identified and named the proton | Ernest Rutherford |
| helped to explain line spectra | Niels Bohr |
| energy emissions in certain quantities due to | energy levels being quantized |
| states that it is impossible to know the energy and the exact position of an electron at the same time | Heisenberg uncertainty principle |
| Louis de proposed | wave nature of electrons |
| type of sublevel found in all principal energy level | s sublevel |
| max # of electrons in a 3p orbital | 2 |
| total electron capacity of the third principal energy level | 18 |
| max # of electrons in a 4d sublevel | 10 |
| 2 different isotopes of a single element would have the same number of _______ but a different number of _______ | protons, neutrons |
| sum of the number of neutrons and the number of protons is known as | mass number |
| determined by the weighted averages of isotopes of an element | atomic mass |
| # of unpaired electrons are in a nitrogen atom | 3 |
| if an atom loses an electron, the atom will have, what kind of charge | positive |
Created by:
cba2012
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