Plum Pudding Flashcards
What is the old model called?
Plum Pudding Model
What did the old model suggest?
That the atom was a ball of positive charge, with electrons scattered inside
How did Rutherford carry out the experiment?
Fired alpha particles at thin, gold foil in a vacuum
What were the results of Rutherford’s experiment?
Most alpha particles passed through the atom meaning the atom is mostly empty space
Very rarely one bounced back (deflects)
What did Rutherford conclude from the experiment?
Because one rarely bounced back, the nucleus of the atom is small and dense
What is the name of the new model?
Nuclear model
Why do the alpha particles bounce back and not stick together?
Because they have a charge of +2, instead of being positive and negative (+1 and -1)
Who carried out the experiment?
Rutherford
