Rutherford
What experiment did Rutherford try?
Gold Foil experiment
Where did Bohr discover the electrons are in the atom
They orbit the nucleus
When did Democritus discover atoms.
400 BC
When did John Dalton make his discoveries?
1800's
When did Thomson come up with his theory?
1897
What year did Rutherford make his discoveries?
1911
What year did Bohr make his discoveries
1913
What experiment did Democritus create. (cutting a seashell)
Thought Experiment
True
What experiment did JJ Thomson perform?
Cathode Ray Tube Experiment
What did Rutherford find about the middle of an atom?
Positively charged nucleus
What do you call it when electrons jump a level
Excited state
Who was Democritus not accepted by so he put his theory on hold.
Aristotle
What indetifies different atoms?
Their size and mass.
What model did JJ Thomson propose
Plum Pudding Model
What covers most of the area in an atom?
empty space
What do you call it when a electron loses energy and fall back to their original level
Ground level
What did Democritus believe about the universe.
Composed of both Being (physical world) and The Void (empty space)
How are compoinds written?
Fixed, whole number ratios.
True or False: Thomson said that atoms do not have a counteracting charge (positive charge)
False, he said they do.
What did Rutherford do in his experiment?
shot alpha particles at thin sheet of gold foil to see if they pass through, deflect, or shoot back
What model did Bohr create
Planetary Model
What was Democritus's nickname
The Laughing Philosopher
True or False: John Dalton believed all atoms of the same element are the same?
True
Did Thomson discover that corpuscles are 1800 times smaller than an atom?
Yes he did