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Gen. Chen. Exam 1

TermDefinition
chemical change Change in the composition of the matter to other substances
Physical change change in the state or property’s of matter without change in chemical composition
heterogenous composition varies from point to point
Daltons first postulate matter is composed of exceedingly small particles called atoms, atom si teh smallest unit of element in chem change
Daltons second postulate element consist of only one type of atom, which has a mass that is characteristic of the element and is the same for all atoms of that element d
daltons third element atoms of one element differ in properties from atoms of all other elements
daltons fourth element compound consist of atoms of 2+ combined in a damaged whole # ratio. In given compound the # of atoms are always present in the same ratio
daltons fifth element atoms are merger created nor destroyed during chem change instead rearranged to Erika different substances- law of conservation of matter
j.j. Thomson cathode ray tube- sealed evacuated tube containing two metal electrodes discovered neutrons
R.a. Millkan oil drop experiment- electrically charged oil drops in electric field discovered electron
Ernest Rutherford Bombarded look foil with ~ particles measured the charge of electron
electron Outside nucleus, 1- unit charge, 0.00055 amu
proton In nucleus, 1+ unit charge, 1.00727 amu
neutron in nucleus, 0 charge, 1.00866 amu
homogenous composition is uniform throughout
Created by: VCutter
 

 



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