Warm Up
1.
2.
3.
4.
9-11-15
When will light (photon) emit from an atom?
Protons, Neutrons, and Electrons for 195Au
An atom has 14 neutrons and 19 protons,
What element is it?
Neutrons and protons have the same _____,
protons and electrons are the same______
Agenda
Homework
Notes Unit 2-5
Lab Flame
Turn in WS unit 2-4
Finish Lab Flame
Sept 14 - Quiz unit 2
Sept 18 - Online HW unit 2
Unit 2-5
Electron Configuration
(locating electrons)
Energy Level
• Energy level (n) –
represented by a
whole number
• Maximum number
of electrons that can
fit in an energy level
is:
2n2
-How many e- in level 2?
-How about 3?
Orbitals
Orbitals (s,p,d,f) – are sublevels in
each energy level
S
2e
P
6e
D
10e
Energy Level and Electron
energy
level (n)
Sublevel per
energy (n)
Maximum
electrons
1
s
2
2
s, p
8
3
s, p, d
18
4
s, p, d, f
32
Electron Configurations
1
2
3
4
5
6
7
Electron Configurations
Electron Configurations
Examples
1.
2.
D orbitals are 1 less energy
Cu and Cr are exceptions
Electron Configuration Problems
Answers

Try:
 Ca
S
 Ti
 Fe
1s22s22p63s23p64s2
1s22s22p63s23p4
1s22s22p63s23p64s23d2
1s22s22p63s23p64s23d6
Flame Test Lab

Clean/Dry and Bring your plate up for the
compounds (only get a small amount!!)

Rinse your nichrome wire in between each
compound to clean it
Clean Up Procedure
All solid compounds from your plate goes
into the trash can
 Clean your lab table
 If your bunsen burner doesn’t have blue
flame please use a wet paper towel and
wipe the tip (caution hot) to get burned
residue off it.
 Rinse your hands after you’re done
cleaning up

Assignments
Summary
 Complete and turn in Unit 2-4 worksheet
 Finish lab write up due next class
