5.1/5.2: Electrons in Atoms

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