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Chapter 12
Things to Memorize
•
λ ν = c, c= 2.9979 x 10
8
m/s
•
electromagnetic radiation: has electrical and magnetic fields that simultaneously
oscillate in planes mutually perpendicular to each other and to the direction of
propagation through space
•
∆E = n h ν, h is an integer greater than 0, h = 6.626 x 10
34
J∙s
•
E
photon
= h∙
c λ
•
deBroglie’s equation:
m
=
h λ ν
, or λ
=
hm v
•
Bohr model equation (used to find energy changes associated with excitement of
electrons)
•
E (in J) = 2.178 x 10
18
J∙
Z2
n 2
,
Z
2
= effective nuclear charge
o
n ranges from 1 (ground state, lowest energy) to ∞ (ionized)
•
Heisenberg uncertainty principle: can’t precisely know both position and
momentum of a particle at a given time
o
∆
≥
x∙ ∆m∙v
h4π
•
Can only know wave function for particle in a box
o
=
(
)
φx
2L sin nπLx
o
=
E
n2h28mL2
where n = 1,2,3,4…
o
Conclusions:
1) There is a series of quantized energy levels (n can only have integer
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This note was uploaded on 02/21/2011 for the course CHE 144 taught by Professor Kerber during the Fall '10 term at SUNY Stony Brook.
 Fall '10
 Kerber

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