atomic theorists Flashcards
what do the bonds on the spectrum correspond to
electrons falling from higher energy levels to lower energy levels
who reintroduced the atom
john dalton
who discovered the electron
jj. thompson
who discovered the nucleus and proton
rutherford
who discovered neutrons
james chadwick
who discovered orbits/shells
bohr
billiard ball
- john dalton
- does not account for subatomic particles
blueberry muffin
- jj. thompson
- could not explain the atoms positive charge
nuclear model
- rutherford
- could not explain the atoms stability
bohr model
- borh
- could not be used for atoms with >1 electrons
what state caused an electron to jump up a level
excited state
DeBroglie
particles such as the electron have wave properties
Schrodinger
published equations to describe the behaviour of an electron
cathode ray tube
JJ Thompson
Contained an electric field to study the stream of particles and expetced that the rays would travel in a straight path but observed a deflection. He came to the conclusion that the cathode ray must be composed of negatively charged particles called electrons.
Gold foil experiment
Positively charged alpha particles were shot at a thin piece of gold foil. And Rutherford predicted that the particles would go straight through. But some alpha particles bounced deflected and even bounced back to the source. Rutherford then discover the nucleus which then contained protons.
