1. made of two protons and two neutrons
   
   
2. similar to an electron; positive charge
   
   
3. orbits nucleus; negative charge
   
   
4. bundle of energy; zero charge
   
   
5. found in nucleus; positive charge
   
   
6. very unstable; +, -, or zero charge
   
   
7. found in nucleus; zero charge
   
   
8. negative particle; negative charge
   
   
9. atomic energy converted to mass
   
   
   

electron


gamma


neutrino


meson


positron


beta


neutron


proton


alpha


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