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RADIOACTIVITY Word Search Puzzle

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Flap 1 Flap 2
radioactive element  elements that emit alpha, beta or gamma radiation  
alpha particle  two protons and two neutrons or a nucleus of a helium atom  
beta particle  an electron ejected by an atomic nucleus  
gamma radiation  extremely energetic form of radiation with no charge and no mass  
strong nuclear force  very strong force that holds the nucleus together  
transmutation  when one element changes to another by emitting an alpha or beta  
half-life  time needed for half the radioactive atoms to decay  
fission  splitting of atomic nucleus into parts; releases energy  
chain reaction  occurs when the product of the reaction starts another reaction  
fusion  small nuclei fuse together producing energy  

 
 
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