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Chem 5/9
Question | Answer |
---|---|
Democritus | thought matter was composed of atoms |
Rutherford | Positively charged alpha particles are ions of helium |
Transmutation | conversion of one element to another by natural or artificial means |
Tracers | chem compound where 1+ atoms are replaced by a radioisotope |
radioisotope | atom with unstable nucleus |
chain reaction | products cause reaction to continue or magnify |
Protium | H-1 |
Deuterium | H-2 |
tritium | H-3 |
Dalton | Revised concept of atom |
ionizing radiation | dislocate bonding electrons and create ions when passing through matter |
transuranic elements | follow uranium. atomic #'s greater than 92 |
fission | heavy nuclide splits into 2 |
critical mass | minimum quantity of an element needed to support a self-sustaining chain reaction |
mass defect | difference between mass of protons and neutrons and the mass of nucleus |
Thomson | showed exisistance of electron |
fusion | uniting 2 light elements to form heavier one |
artificial nuclear rection | disintegrate in definite fashion with specific half life |