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MASS is never created nor destroyed in any chemical reaction
proposed combustion theory -
Electro magnetic induction
electrolisys splitting of molecules with electricity -
Atoms indivisible units
All matter is made up of tiny particales called elements
All atoms from a given element are alike, but are different from the atoms of any other element
Compounds are formed when atoms of different elements combine in fixed proportions
a chemical reaction involes a rearrangment of atoms, not a change in the atoms themselves -
Oil drop experiment helped determine the mass and charge of an electron
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Descovered the neutron
unit of measurement for subatomic particles is the atomic mass
neutrons have a mass nearly equal to the mass of a proton
neutrons have no charge -
catheode ray tube
Atoms contain negatively charged particles called electrons and positively charged matter -
gold foil experiment
all atoms positivley charged particles where contained in the nucleus
negative chared where scattered around the edge
descovered nucleus -
electrons are located in fixed circle
electrons move in specific layers or energy levels
electrons can jump from layer to layer -
atoms are arranged layers within layers in terms of electron shells
predicts probability
wave mechanics and quantum mechanics
