CHEM1811 Lecture Notes - Lecture 9: Principal Quantum Number, Bohr Model, Azimuthal Quantum Number
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Video 03
Bohr model of the atom: energy within atom is quantised
n=3
n=2
n=1 a
1l
a' +ze
?
X
The energy level is given by a
quantum number n.
DMibinE electroG and tus ffiqw
al33
Only specirc ersB/ stdes
allowed, eah sth prin.ipal
quart!fr iumber .
Thngtion of electron frofi l
lowerto higher eneryy I
5xate abssbs enerty ]
A new quantum mechanical picture for the electrons
Matter and energy as waves... Erwin Schrodinger's equation for
matter in wave form:
- I nd(b
rl,, is the wave; ty'2 is the
probability of finding the
electron in a particular region
H is a differential operator that
-st*dorld.m describes the system
+ The details of the Schrddinger equation are beyond the scope of this coursel
Dsribiq electm aad xqro & ursrru
Quantum numbers: principal quantum number
Principal quantum number has
same meaning as n in the Bohr
model
Collection of orbitals with the same
n are an "electron shell"
lnfinite number of possible values
for n but most empty
I
:
I
symbol: n
size of the orbital
.rneanS
r laiger ?? meanffi#
r values: n: 1 to oo
Oasoibitrg electrm ffd at@s
7A/33 ffi'mw
