Nuclear Energy
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20 Terms
nuclear energy meaning
energy released from changes inside atomic nuclei
Nuclear fission meaning
One large nucleus splits into two smaller nuclei
fission trigger
neutron absorbed by a heavy nucleus
fission products
two smaller nuclei neutrons and energy released
chain reaction meaning
neutrons from one fission cause more fission events
controlled chain reaction
steady energy release in a nuclear reactor
uncontrolled chain reaction
rapid explosive release of energy
fission fuel
uranium 235 or plutonium 239
energy release reason
small amount of mass converts into energy
nuclear fusion meaning
Two small nuclei join together to produce a larger nucleus
fusion conditions
extremely high temperature and pressure needed
fusion energy
large amount of energy released
fusion example
hydrogen nuclei fusing in the sun
fusion difficulty
hard to achieve on Earth due to required conditions
mass energy link
small mass loss becomes energy
einstein equation
E = mc²
energy conversion meaning
nuclear processes convert mass into energy
advantages nuclear energy
no greenhouse gases during operation and high energy output
disadvantages nuclear energy
radioactive waste accident risk and high cost
key idea
nuclear energy comes from mass turning into energy during fission or fusion