Tuesday, September 22, 2009Tuesday, September 22, 20091.1. Warmup:Warmup: Create a “KWL”- WATER Create a “KWL”- WATER

PURIFICATION: What do you know? PURIFICATION: What do you know? What do you want to know? Leave What do you want to know? Leave the “L” blank for now.the “L” blank for now.

2.2. Pg. 165 #6-9 discussed, due.Pg. 165 #6-9 discussed, due.3.3. Notes: p.165#10-13Notes: p.165#10-134.4. Safety GogglesSafety Goggles5.5. Begin lab p.756-9Begin lab p.756-96.6. Homework: Read Chapter 4 Homework: Read Chapter 4

this week, P.115#1-3 due this week, P.115#1-3 due tomorrow.tomorrow.

Page 165 #10-13 Page 165 #10-13 NOTESNOTES 10. How could each of the 10. How could each of the

following atoms react to achieve following atoms react to achieve a noble- gas configuration?a noble- gas configuration?– A. iodine. A. iodine. – Info : I, #53, group 17. Info : I, #53, group 17. – Answer: Iodine would need to gain Answer: Iodine would need to gain

an electron, becoming an anion. I-an electron, becoming an anion. I-

Page 165 #10-13 Page 165 #10-13 NOTESNOTES 10. How could each of the 10. How could each of the

following atoms react to achieve following atoms react to achieve a noble- gas configuration?a noble- gas configuration?– B. strontiumB. strontium– Info: Sr, #38, Group 2Info: Sr, #38, Group 2– Answer: strontium would lose two Answer: strontium would lose two

electrons, becoming a cation, Sr electrons, becoming a cation, Sr +2+2

Page 165 #10-13 Page 165 #10-13 NOTESNOTES 10. How could each of the 10. How could each of the

following atoms react to achieve following atoms react to achieve a noble- gas configuration?a noble- gas configuration?– C. NitrogenC. Nitrogen– Info: N, # 7, group 15, 5 valence Info: N, # 7, group 15, 5 valence

electronselectrons– Answer: Nitrogen would acquire 3 Answer: Nitrogen would acquire 3

electrons, becoming an anion, Nelectrons, becoming an anion, N-3-3

Pg. 165 #11Pg. 165 #11

Electron configurations…Electron configurations… Orbitals, energy levels, s,p,d,f,gOrbitals, energy levels, s,p,d,f,g Beryllium, oxygenBeryllium, oxygen Electron spinsElectron spins

Tuesday, September 22, 2009Tuesday, September 22, 20091.1. Warmup:Warmup: Create a “KWL”- WATER Create a “KWL”- WATER

PURIFICATION: What do you know? PURIFICATION: What do you know? What do you want to know? Leave What do you want to know? Leave the “L” blank for now.the “L” blank for now.

2.2. Criminalistics p.167-8 #1-33 dueCriminalistics p.167-8 #1-33 due3.3. Magnetic Field Lines Lab is dueMagnetic Field Lines Lab is due4.4. Homework due Thursday: p.626 Homework due Thursday: p.626

Physical Science Book, #35Physical Science Book, #355.5. Notes p. 541-553Notes p. 541-553 (PHYSICS book) (PHYSICS book)

due in binder Thurs.due in binder Thurs.

PLEASE QUIETLY LISTEN TO THE PLEASE QUIETLY LISTEN TO THE ANNOUNCEMENTS…ANNOUNCEMENTS…

Notes p.541-53, Notes p.541-53, PHYSICSPHYSICS Chapter 20 : Static ElectricityChapter 20 : Static Electricity Electrostatics: the study of Electrostatics: the study of

electric charges that can be electric charges that can be collected and held in one place.collected and held in one place.

Key Words: electrostatics, Key Words: electrostatics, neutral, insulator, conductorneutral, insulator, conductor

Like charges repel; opposite Like charges repel; opposite charges attractcharges attract

Notes p.541-53, Notes p.541-53, PHYSICSPHYSICS Static electricity can be produced Static electricity can be produced

by conduction, induction, and by conduction, induction, and friction.friction.

FRICTION: two objects rub against FRICTION: two objects rub against each other- there is a transfer of each other- there is a transfer of electronselectrons

CONDUCTION: a charged object CONDUCTION: a charged object touches a conductor; there is a touches a conductor; there is a transfer of electronstransfer of electrons

examplesexamples

FRICTION: rub balloons with fur; FRICTION: rub balloons with fur; rub hair with balloon; shuffle feet rub hair with balloon; shuffle feet across the carpetacross the carpet

CONDUCTION: A person with a CONDUCTION: A person with a static charge touches a friend and static charge touches a friend and they get a SHOCK; a charged they get a SHOCK; a charged balloon touches foil on an balloon touches foil on an electroscopeelectroscope

inductioninduction

INDUCTION- When a charged INDUCTION- When a charged object comes NEAR another object comes NEAR another object, causing a displacement of object, causing a displacement of electronselectrons

Excess charge can be transferred Excess charge can be transferred out of the opposite end of the out of the opposite end of the object …object …

A diagram follows.A diagram follows.

Page 544- PHYSICSPage 544- PHYSICS

MICROSCOPIC VIEW OF CHARGEMICROSCOPIC VIEW OF CHARGE When the atom has the same number When the atom has the same number

of protons and electrons, it is NEUTRALof protons and electrons, it is NEUTRAL CONDUCTORS easily surrender their CONDUCTORS easily surrender their

electrons. Metals are good conductors.electrons. Metals are good conductors. INSULATORS do not easily surrender INSULATORS do not easily surrender

their electrons; wood is a good their electrons; wood is a good insulator.insulator.

SEPARATION OF SEPARATION OF CHARGECHARGE

Another way of visualizing transfer Another way of visualizing transfer of static electricityof static electricity

Induction: positive and negative Induction: positive and negative charges are separated within an charges are separated within an object, but not transferred beyond object, but not transferred beyond the objectthe object

Conduction and Friction: charges are Conduction and Friction: charges are first separated, then transferredfirst separated, then transferred

Tuesday, September 22, 2009Tuesday, September 22, 20091.1. Warmup: Warmup: What are some PROPERTIES What are some PROPERTIES

of water?of water?

2.2. HW due-HW due- answers to yesterday’s lab answers to yesterday’s lab safety q’ssafety q’s

3.3. Quick Lab: ObservationsQuick Lab: Observations

4.4. Discuss: Properties.Discuss: Properties. Define Define chemical and physical properties, give chemical and physical properties, give examplesexamples

5.5. Begin density labBegin density lab

6.6. Homework Frayer Models for each Homework Frayer Models for each of 10 vocab words, due Thurs.of 10 vocab words, due Thurs.

Warmup: Properties of WaterWarmup: Properties of Water LiquidLiquid ClearClear Drink itDrink it Sometimes saltySometimes salty Part of the environmentPart of the environment In foodIn food No taste/ “nasty”No taste/ “nasty” NaturalNatural Can swim in it-fish, peopleCan swim in it-fish, people BubblesBubbles Can make things with itCan make things with it Can wash in itCan wash in it H2OH2O Grow plantsGrow plants Keep hydrateKeep hydrate Has mineralsHas minerals

QUICK LAB: QUICK LAB: observationsobservations What characteristics/ categories What characteristics/ categories

can we observe?can we observe? As a class: construct a tableAs a class: construct a table Complete the tableComplete the table Due todayDue today

QuickLab: QuickLab: ObservationsObservations

Physical PropertyPhysical Property

Definition:Definition: Examples:Examples:

Chemical PropertyChemical Property

Definition:Definition: Examples:Examples:

Begin Density LabBegin Density Lab

What is density?What is density? How is it calculated?How is it calculated? What is the density of water?What is the density of water? How can we find the density of a How can we find the density of a

bowling ball?bowling ball?

Vocabulary WordsVocabulary Words

DensityDensity MassMass VolumeVolume Physical propertyPhysical property Chemical propertyChemical property WeightWeight MixtureMixture Compound atomCompound atom moleculemolecule

Frayer ModelFrayer Model