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level: radioactivity

Questions and Answers List

level questions: radioactivity

QuestionAnswer
explain why alpha particles and beta particles have different penetrating powers.alpha particles have heavy mass and higher charge, means they cause more ionisation, energy lost from ionisation means alpha cant pentrate as far, also the alpha particles are more likely to collide with atoms as they are bigger
what is ionising radiationrandom process, either alpha, beta or gamma is given off
what happens in alpha decay2 neutrons and 2 proteons are emitted
what happens in alpha decaydecreases by 4
what happens in alpha decaydecreases by 2
what happens in beta decayneutrons turn into protons and stays in the nucleus, an electron is emmited
what happens in beta decayunchanged
what happens in beta decayproton number increases by 1
what particle has the most ionising poweralpha
what particle has the least ionising powergamma
what is alpha stopped byair, range of 5 - 10cm
what is beta stopped byalluminium foil, range of metres
what is gamma stopped byseveral cm of lead or several m of concrete, infitnte range in air
when is gamma emmitedafter the emission of alpha and beta
nature of radioactive emissionhappens randomly, cant predict decay or direction, unaffected by temprature change
explain why alpha particles and beta particles have different penetrating powers.alpha particles have heavy mass and higher charge, means they cause more ionisation, energy lost from ionisation means alpha cant pentrate as far, also the alpha particles are more likely to collide with atoms as they are bigger