Atomic models Flashcards
1
Q
John Daltons model
A
Small indivisible spheres
Atoms of the same element are identical
Compounds are formed when atoms join together in simple ratios
2
Q
J. J. Thomson’s model
A
Plum pudding model
Electrons found in a cloud of positive charge
Explains to cathode ray experiment
3
Q
Rutherford’s model
A
Small, positive, massive nucleus, with electrons orbiting
The planetary model
4
Q
Bohr’s model
A
Fixed electron energy levels
They can move up and down when they absorb and emit EM waves
5
Q
Modern model
A
Electrons exist in clouds of probability, e.g orbitals.
6
Q
What is the cathode ray experiment
A
2 oppositely charged metal plates caused a particle to accelerate through them, which is evidence of a negative electron
