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chemistry 340

ch.2

QuestionAnswer
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
Created by: romdog on 2009-03-05



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