test for 3/12/12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| discovered radioactivity,hypothesis is that radioactivity is "invisible energy emitting from ore" | becquerie
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| students of becquerie, studied "invisible energy",coined word radioactivity, made 1st synthetic elements | Pierre and Marie Currie
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| first synthetic elements made | Radium and polonium
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| the release of particles and energy from an unstable nuclei | radioactivity
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| the number of protons doesnt equal number of neutrons | unstability
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| an element with a specific atomic mass and specific atomic number | nuclide
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| spontanious breahdown of the nuclei | radioactive decay
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| one element turning into another element | transmutation
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| weakest form of radiation,made of 2 protons and 2 neutrons,positive particle,helium nucleus,can be stopped by a single sheet of paper | alpha particle
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| negative charged particle,100x more penetration power,x-rays are created during _____ decay, can be stopped by 1cm of Al | beta particle
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| not a particle,travels in waves,high frequency,short wavelength,cellular damage,can be stopped by high dense matter like pb | gamma radiation
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| the time it takes for half of the radioactivity sample to decay | half life
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| the atoms that undergo fission in the reactor | fuel supply
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| pb "tylenol" around the core,secondary _________ unit structure is high density concreate | containment
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| slows down the speed of neutrons to increase the accuracy of the hit,in the US heavy H2O | moderator
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| rver water is constantly pouring over the core carrying heat away,helps control temps. | coolant
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| controls the rate of the fission reaction,act like magnet to absorb neutrons to speed up/slow or stop chain reaction,in US boron and cadmium | control rods
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| uses an electric current to detect radiation, glass tube filled with Ar or He with W wire running through it | geiger counter
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| super saturated water vaper in a clean chamber, introduce radiation and leaves" cloud tracks" everywhere radiation was | cloud chamber
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| fill a chamber with liquid just below boiling point,introduce radiation and bubble from everywhere radiation was | bubble chamber
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| plate coated with AgBr, introduce radiation, reacts with AgBr to make a negative image of radiation pattern | nuclear emulsion
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| during this, a helium nucleus is released form an unstable nucleus | alpha decay
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| protons and neutrons are held together by this in a nucleus | binding energy
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| an element with unstable nuclei produces this | radioactivity
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| a neutron changes into a proton during this | beta decay
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| the release of alpha particles is one kind of this | radioactive decay
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| the most energetic type of radioactive decay is this | gamma decay
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| when a nucleus of uranium-235 undergoes this 2 smaller nuclei result | nuclear fission
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Created by:
dominator11
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