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chapter 3 .... .
Question | Answer |
---|---|
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 |