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chapter 3 .... .

relative atomic mass the mass of an atom given in amus
average atomic mass the weighted average of atomic masses of isotopes
molar mass the mass of one mole of a substance
a chemical compound always has the same elements in the same in proportions by mass regardless of the source of the compound; this is a statement of: the law of definite proportions
an important result of rutherforsds exp. with gold foil was to establish that: the atom is mostly empty space
cathode rays are composed of electrons
a glass of ice cubes will have the same mass melted as it will not melted eventhough it has a dif volume. what law? law of conservation of mass
2 principles from daltons atomic theroy that have been revised atoms of a given element are identical- theres isotopes;;; atoms cant be subdivided or destroyed- they can be subdivided into p e n
in cathode ray tubes the cathode ray is emitted from the neg electrode, which is caled the cathode
guy who 1st says natures basic particle is the atom which cant be created destroyed or divided democtitis
guy who rejects democritisis idea and says matter is formed from air fire and water aristotle
if 2 or more dif. compunds are composed of same elemnts then the ratio is always a small whole number. this law is? law of multiple proportions
3 true parts of daltons atomic theroy 1 all matter is comosed of atoms...2 atoms of dif. elents combine in simple whole number ratios to form compounds...3 in chemical reactions atoms are combined seperated or re aranged.
what chemical laws can be explained on the basis of daltons theroy? definite proportions and multiple proportions
two ends of cathode ray tube cathode and anode
guy who preformed cathode ray experiment and discovored the electron jj thomson
guy who did the gold expeierment and discovored nucleus rutherford
who disocored the nuetron? james chadwich
what are the protons and nuetrons held togther by nuclear forces
radii of an atom 100pm
radi of nucleus 0.001 pm
Created by: ashchem