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rutherford
said that nucleus is positively charged and has the most mass
bohr
proposes that the hydrogen atom only has certain allaable energy states.
Lowest energy state:
ground state
Highest energy state:
excited state
What was something Bohr said? (FALSE)
electrons move around the nucleus in certain allowed orbits
Quantum numbers
assigned to each orbit
first orbit
closest to nucleus
n=1
second orbit
n=2
2 Problems with Bohr
only explained hydrogen
said electrons move in orbits
heisenburg uncertainty principle
it is impossible to know exactly where the electron is located in the atom at any given time
schrodinger
atom model guy
More probable:
more dense
Less probable:
less dense
electron movement
they don’t just willy nilly move
steps of electron movement
1) Ground state, b=1
2) energy is added
3)becomes excited, moves to high energy level
4)grows unstable, drops from a high to low level and emits energy
