Warm UpWarm Up 9-11-159-11-151. When will light (photon) emit from an atom?2. Protons, Neutrons, and Electrons for 195Au3. An atom has 14 neutrons and 19 protons,

What element is it? 4. Neutrons and protons have the same _____,

protons and electrons are the same______

HomeworkFinish Lab FlameSept 14 - Quiz unit 2Sept 18 - Online HW unit 2

AgendaNotes Unit 2-5Lab Flame Turn in WS unit 2-4

Unit 2-5Unit 2-5Electron ConfigurationElectron Configuration

(locating electrons)(locating electrons)

Energy LevelEnergy 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?

OrbitalsOrbitals

S

P

D

Orbitals (s,p,d,f) – are sublevels in each energy level

2e

6e

10e

Energy Level and ElectronEnergy Level and Electron

Maximum electrons

energy level (n)

1 22 83 184 32

s, p

Sublevel per energy (n)

s

s, p, d

s, p, d, f

Electron ConfigurationsElectron Configurations1

23456

7

Electron ConfigurationsElectron Configurations

Electron Configurations Electron Configurations ExamplesExamples

1.1. D orbitals are 1 less energy D orbitals are 1 less energy 2.2. Cu and Cr are exceptionsCu and Cr are exceptions

Electron Configuration ProblemsElectron Configuration ProblemsAnswersAnswers

Try:Try:CaCaSSTiTiFeFe

1s1s222s2s222p2p663s3s223p3p664s4s22

1s1s222s2s222p2p663s3s223p3p44

1s1s222s2s222p2p663s3s223p3p664s4s223d3d22

1s1s222s2s222p2p663s3s223p3p664s4s223d3d66

Flame Test LabFlame Test Lab Clean/Dry and Bring your plate up for the Clean/Dry and Bring your plate up for the

compounds compounds ((only get a small amount!!)only get a small amount!!)

Rinse your nichrome wire in between each Rinse your nichrome wire in between each compound to clean itcompound to clean it

Clean Up ProcedureClean Up ProcedureAll solid compounds from your plate goes All solid compounds from your plate goes

into the into the trash cantrash canClean your lab tableClean your lab table If your bunsen burner doesn’t have blue If your bunsen burner doesn’t have blue

flame please use a wet paper towel and flame please use a wet paper towel and wipe the tip (caution hot) to get burned wipe the tip (caution hot) to get burned residue off it.residue off it.

RinseRinse your hands after you’re done your hands after you’re done cleaning upcleaning up

AssignmentsAssignmentsSummarySummaryComplete and turn in Unit 2-4 worksheetComplete and turn in Unit 2-4 worksheetFinish lab write up due next classFinish lab write up due next class