3-2: The Atom: Thomson and Rutherford Flashcards
1
Q
What did Thomson discover in his experiment?
A
Cathode rays must be made of stuff that is negatively charged
All different metals give off cathode rays
Atoms are usually neutral
2
Q
What was J. J. Thomson’s experiment?
A
Cathode Ray Experiment
3
Q
What was Rutherford’s experiment?
A
Gold Foil
4
Q
What are alpha particles?
A
Tiny, positively charged particles much smaller than an atom.
5
Q
What are alpha particles made of?
A
Two protons + Two neutrons
