Transcript 3 section 4.2 pd9

Question of the Day
1. What was De Broglie’s idea about
electrons?
2. Why is it impossible to
determine the speed and
location of an electron at the
same time?
Day 4 1-9
Objective /
Essential Question
How do we define / describe an
electron’s location in the atom?
Review
1. If an electron absorbs energy it
moves into an excited
_______ state.
2. Almost immediately it falls back
down to the _______
ground state.
Notes
Revisiting
the
Electron
Cloud
Page 7
Electron Position:
probability
orbitals
uncertainty
***Electron Distribution
element***
Properties of
How can the whereabouts of an
electron compare to an
apartment building?
Floor/story of
building
Energy level
Sublevel (orbital shape)
Suite/apartment
Orbital for e- couple
Bedroom
(orientation in space)
Female / Male
Spin
The Address of the Electrons
Just like people in an apartment, electrons have an
address. The most probable location of an electron is
described using quantum numbers. Each electron has
4 quantum numbers which each relays a different
piece of information about the electron’s possible
whereabouts in the atom.
The Address of the Electrons
Pauli exclusion- no 2 electrons
can have the same address!!! –
same 4 quantum numbers
Describing Atomic Structure
Energy level – regions of space
where there is a high probability of
finding electrons
Energy levels - break into -
Sublevels - break into Orbitals
Q of the Day
1. What Bohr thought of as a
definite, specific radius was
actually …
Day 5 1-13
Objective /
Essential Question
How do we define / describe an
electron’s location in the atom?
Describing Atomic Structure
Sublevels
3
2
1
First sublevel –
2 electrons
Second sublevel
– 6 electrons
Third
sublevel – 10
electrons
Describing Atomic Structure
– Building an Address
Energy levels – designated by - #
1st Level = 1, 2nd Level = 2, etc. …
Sublevels – designated by – letter
(s, p, d, f) 1st Sublevel = s
2nd Sublevel = p
3rd Sublevel = d
4th Sublevel = f
Describing Atomic Structure
# of energy level = # of sublevels
in that energy level
Energy level 1 = 1 sublevel
Energy level 2 = 2 sublevels
Energy level 3 = 3 sublevels
…
Describing Atomic Structure
E n e r g y
Sublevels
f
d
p
s
Energy still Increases away from the nucleus
Electron Arrangement
Energy level
1, sublevel s,
orbital 1s
2
1
3
Energy level 2,
has two
sublevels s and
p, 2s orbital and
2p orbitals
Energy level 3, 3
sublevels s, p, and
d, 3s orbital, 3p
orbitals, and 3d
orbitals
Electron Arrangement
Quantum #s – specify the properties of
atomic orbitals and the properties of
electrons in those orbitals
Electron Arrangement
Energy levels – designated by a #
s=0
p=1
d=2
f=3
E n e r g y
Sublevels –
designated by –
letter (s, p, d, f)
Energy still Increases away from the nucleus
The New Atom?
Do you think Bohr was
right or wrong?
Pauli exclusion?
Energy levels - break into Sublevels - break into -
Orbitals
Electron Arrangement
How many electrons in an orbital?
2 electrons fit in an orbital one
spinning in the +1/2 orientation and
one spinning in the -1/2 orientation
Electron Arrangement
How many orbitals in each sublevel?
s=1
p=3
d=5
f=7
Electron Arrangement
How many sublevels
in each energy level?
1 = _____ (__)
3
2 = _____ (____)
3 = _____ (______)
4 = _____ (__________)
2
1
Electron Arrangement
4
xx xx xx xx
xx xx xx xx xx
3
xx xx xx xx
xx xx xx xx xx
2
xx xx xx xx
d
xx xx xx xx xx xx xx
f
p
1
xx
s
Each x = an electron
Each xx = an orbital
Quick Draw
radiant energy
Excited state
wavelength
electron cloud model
Bohr
Sit with your lab group from
yesterday (if you were absent I
will assign you a group
shortly).
Get out your lab!
Day 1 1-16
Sit with your lab group from
yesterday (if you were absent I
will assign you a group
shortly).
Get out your lab!
Day 2 1-17
Leave your Binder
at the end of class:
Zac Miller
Raevon Britt
Ivan Martinez
LAB
1. Why is an atomic emission
spectra often compared to an
element’s fingerprint?
Don’t forget to hand in your lab!!!
Get out your lab!
Day 4 1-23
Excused Unexcused Excused
Unexcused Total
Late
Late (1)
Absences Absences
(1/2)
(1)
(2)
Period 1
1
0
2
7
16.5
Period 3
1
0
0
9
19
Period 6
1
1
8
16
41.5
Period 7
0
3
5
6
18
Period 9
0
2
5
2
11
Quick Talk
Ground state
radiant
energy
Bohr
photon
frequency
Compton
quanta
excited state
continuous
particle or wave
Sit in your assigned seat!
How are wavelength and energy
related? As one ___ the other
___.