P4 - Atomic Structure

P4 - Atomic Structure

1. structure of the atom

   • nucleus
     • proton
       • charge= +1
       • mass= 1
     • neutron
       • mass= 1
       • charge= 0
   • electron
     • mass=close to 0(1/2,000)
     • charge= -1

2. raiation

   • alpha
     • mass= 4
     • charge=2+
     • very strongly ionising
   • beta
     • mass= 1/1832
     • charge= -1
     • fairly ionising
   • gamma
     • mass=0
     • charge=0
     • weakly ionising

3. fission and fusion

   • fusion
     • occurs when a small neutron slams together and forms a large atom
     • fission
       • when a nucleus splits into 2 smaller nuclei