ch.2
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| atomic number | the number of protons in the nucleus of an atom of an element | ||||
| niels bohr | Danish physicist who studied atomic structure and radiations | ||||
| dalton's atomic model | an observer of weather and discoverer of color blindness among other things, came up with his atomic theory | ||||
| democritus | the idea that matter is made up of fundamental particles called atoms. | ||||
| electrons | A stable subatomic particle in the lepton family | ||||
| mass number | the integer nearest in value to the atomic weight of an atom and equal to the number of nucleons in the nucleus of the atom | ||||
| dalton | British chemist whose pioneer work on the properties of gases led to his formulation of the atomic theory. He also studied his own condition of colorblindness. | ||||
| isotope | any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights | ||||
| mass spectrometer | a device for identifying the kinds of particles present in a given substance | ||||
| nucleus | a central part about which other parts are grouped or gathered | ||||
| amu | atomic mass unit | ||||
| protons | A stable, positively charged subatomic | ||||
| neutron | an elementary particle having no charge | ||||
| rutherford | Scottish physician and chemist: discoverer of nitrogen. | ||||
| theory | non-technical contexts to mean an untested idea or opinion | ||||
| law of definite proportions | law stating that every pure substance always contains the same elements combined in the same proportions by weight |
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Created by:
romdog
on 2009-03-05