Discovery

Discovery

1. Observations

   • most α passed straight through
   • No. deflected ↓ as Ѳ ↑
   • 1/1000 bounced back

2. Nucleus Conclusions

   • + charged because repelled α
   • smaller than atom
     • α able to pass through
   • majority of mass

3. acceptance

   • repeatable
   • predicted neutron
   • explained radioactivity

4. plum pudding

   • why α were scattered
     • large angles

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