2.1 Flashcards
(20 cards)
Who discovered electrons
J.J Thomson
Who reintroduced the atom
John Dalton
Who discovered the orbits/shells
Neils Bohr
Who discovered the nucleus and protons
Ernest Rutherford
Who discovered the neutrons
James Chadwick
Neil’s Bohr model name
Bohr model
Can’t be used for atoms with less than one electron.
J.J Thomson model
Blueberry muffin model
Couldn’t explain atoms positive charge
John Dalton model
Billard ball model
Doesn’t account for subatomic particles
Ernest Rutherford model
Nuclear model
Can’t explain atoms stability
Who used the gold foil experiment
Ernest Rutherford
Who used the cathode ray tube
J.J Thomson
Who used the hydrogen emission spectrum
Neil’s Bohr
What do the bands on the spectrum correspond to
Energy falling from energy levels to lower energy levels. It’s impossible for electrons to exist in between energy levels.
When is an electron in its excited state
When an electron is in energy level n<1
Which model is the e-‘s path circular
Orbits Bohr model
In the orbitals quantum model explain the distance
Distance of orbit to nucleus varies because they vary in size
Location of e-‘s in orbitals
No set path
Orbits Bohr model
2D J each orbit has 2n^2 e-
Orbitals quantum model
3D J each orbit has only 2e-
Distance in orbits Bohr model
Distance of orbit to nucleus is fixed.
