Catalyst – February 32, 2011
WAY BACK WEDNESDAY!!!
1.
2.
3.
Which layer is oldest:
23, 24, 25, or 31?
Which layer is youngest:
23, 24, 25, or 31?
Which occurred last:
Lava Flow A, Lava Flow
B, or Sill/Magma
Chamber?
Today’s Agenda
Catalyst
 Review Electron Configuration
 Overview of Project
 Exit Question

HW: STUDY FOR TEST, RESEARCH
ELEMENT
Today’s Objectives
SWBAT write long electron
configurations and noble gas
configurations for elements.
 SWBAT begin their element project!

How? Schrödinger Equation
REVIEW: The Schrödinger Equation
predicts the location of an electron
in an atom.
 It tells us that electrons hang out in
atomic orbitals.
 Imagine electrons filing into hotels…
Schrödinger Equation and Atomic
Orbitals
REVIEW: There are 4 atomic orbitals…
s
p
d
f
The s Orbital
One s orbital in each energy level
The s orbital is shaped like a sphere
Can hold 2 electrons total
The p Orbital
Three p orbitals in each energy level
(starting in the 2nd energy level!)
Shape looks like dumbells or bowties
Can hold 6 electrons total
The d orbital
-Five d orbitals in
each energy level
(starting in the 3rd
energy level!)
-Shape looks like
eggs or flowers
-Can hold 10
electrons
The f orbital


Seven f orbitals (starting in 4th energy level!)
Can hold 14 electrons
So how many electron fit in the
THIRD energy level???
32
18
8
2
Electron Configuration


REVIEW: Electron configuration
shows how the electrons are
distributed among the various
atomic orbitals and energy levels.
The format consists of a series of numbers, letters,
and superscripts as shown below:
1s2
The Code
Small superscript number = Number of electrons
2
1s
Large number = energy level
Letter = orbital
Na –
Electron Configuration
2
2
6
1
1s 2s 2p 3s
= 11 e-
Electron Configuration
Be:
Ar:
Zn:
Electron Configuration
Be:
2
2
1s 2s
Ar:
2
2
6
2
6
1s 2s 2p 3s 3p
Zn: 1s22s22p63s23p64s23d10
Noble Gas Configuration
Scientists are WAY too
lazy to write all that
mess!
Electron Configuration
FIGURE IT OUT YOURSELF!!! (10 mins)
2
14
10
[Xe]6s 4f 5d
Hg –
2
4
S – [Ne]3s 3p
2
5
Sm – [Xe]6s 4f
SiRb-
Noble Gas Configuration

Key Point #4: Noble Gas
configuration starts with noble gas
BEFORE the atom you are going to.
Examples of Noble Gas Configuration



Long Electron Configuration
Noble Gas Configuration
2
1
Al – 1s22s22p63s23p1
 Al – [Ne]3s 3p
2
2
Ti – 1s22s22p63s23p64s23d2
 Ti – [Ar]4s 3d
Rb – 1s22s22p63s23p64s23d104p65s1  Rb – [Kr]5s1
Now you try…
Project Overview
Exit Question
1.
2.
What is your element for the
project?
What topics do you need to review
the most before the test on Friday?