Tuesday, September 22, Warmup: Create a “KWL”- WATER PURIFICATION: What do you know? What do you want to know? Leave the “L” blank for now. 2. Pg. 165 #6-9 discussed, due. 3. Notes: p.165# Safety Goggles 5. Begin lab p Homework: Read Chapter 4 this week, P.115#1-3 due tomorrow.

Page 165 #10-13 NOTES 10. How could each of the following atoms react to achieve a noble- gas configuration? 10. How could each of the following atoms react to achieve a noble- gas configuration? –A. iodine. –Info : I, #53, group 17. –Answer: Iodine would need to gain an electron, becoming an anion. I-

Page 165 #10-13 NOTES 10. How could each of the following atoms react to achieve a noble- gas configuration? 10. How could each of the following atoms react to achieve a noble- gas configuration? –B. strontium –Info: Sr, #38, Group 2 –Answer: strontium would lose two electrons, becoming a cation, Sr +2

Page 165 #10-13 NOTES 10. How could each of the following atoms react to achieve a noble- gas configuration? 10. How could each of the following atoms react to achieve a noble- gas configuration? –C. Nitrogen –Info: N, # 7, group 15, 5 valence electrons –Answer: Nitrogen would acquire 3 electrons, becoming an anion, N -3

Pg. 165 #11 Electron configurations… Electron configurations… Orbitals, energy levels, s,p,d,f,g Orbitals, energy levels, s,p,d,f,g Beryllium, oxygen Beryllium, oxygen Electron spins Electron spins

Tuesday, September 22, Warmup: Create a “KWL”- WATER PURIFICATION: What do you know? What do you want to know? Leave the “L” blank for now. 2. Criminalistics p #1-33 due 3. Magnetic Field Lines Lab is due 4. Homework due Thursday: p.626 Physical Science Book, #35 5. Notes p (PHYSICS book) due in binder Thurs.

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

Notes p , PHYSICS Chapter 20 : Static Electricity Chapter 20 : Static Electricity Electrostatics: the study of electric charges that can be collected and held in one place. Electrostatics: the study of electric charges that can be collected and held in one place. Key Words: electrostatics, neutral, insulator, conductor Key Words: electrostatics, neutral, insulator, conductor Like charges repel; opposite charges attract Like charges repel; opposite charges attract

Notes p , PHYSICS Static electricity can be produced by conduction, induction, and friction. Static electricity can be produced by conduction, induction, and friction. FRICTION: two objects rub against each other- there is a transfer of electrons FRICTION: two objects rub against each other- there is a transfer of electrons CONDUCTION: a charged object touches a conductor; there is a transfer of electrons CONDUCTION: a charged object touches a conductor; there is a transfer of electrons

examples FRICTION: rub balloons with fur; rub hair with balloon; shuffle feet across the carpet FRICTION: rub balloons with fur; rub hair with balloon; shuffle feet across the carpet CONDUCTION: A person with a static charge touches a friend and they get a SHOCK; a charged balloon touches foil on an electroscope CONDUCTION: A person with a static charge touches a friend and they get a SHOCK; a charged balloon touches foil on an electroscope

induction INDUCTION- When a charged object comes NEAR another object, causing a displacement of electrons INDUCTION- When a charged object comes NEAR another object, causing a displacement of electrons Excess charge can be transferred out of the opposite end of the object … Excess charge can be transferred out of the opposite end of the object … A diagram follows. A diagram follows.

Page 544- PHYSICS MICROSCOPIC VIEW OF CHARGE MICROSCOPIC VIEW OF CHARGE When the atom has the same number of protons and electrons, it is NEUTRAL When the atom has the same number of protons and electrons, it is NEUTRAL CONDUCTORS easily surrender their electrons. Metals are good conductors. CONDUCTORS easily surrender their electrons. Metals are good conductors. INSULATORS do not easily surrender their electrons; wood is a good insulator. INSULATORS do not easily surrender their electrons; wood is a good insulator.

SEPARATION OF CHARGE Another way of visualizing transfer of static electricity Another way of visualizing transfer of static electricity Induction: positive and negative charges are separated within an object, but not transferred beyond the object Induction: positive and negative charges are separated within an object, but not transferred beyond the object Conduction and Friction: charges are first separated, then transferred Conduction and Friction: charges are first separated, then transferred

Tuesday, September 22, Warmup: What are some PROPERTIES of water? 2. HW due- answers to yesterday’s lab safety q’s 3. Quick Lab: Observations 4. Discuss: Properties. Define chemical and physical properties, give examples 5. Begin density lab 6. Homework Frayer Models for each of 10 vocab words, due Thurs.

Warmup: Properties of Water Liquid Liquid Clear Clear Drink it Drink it Sometimes salty Sometimes salty Part of the environment Part of the environment In food In food No taste/ “nasty” No taste/ “nasty” Natural Natural Can swim in it-fish, people Can swim in it-fish, people Bubbles Bubbles Can make things with it Can make things with it Can wash in it Can wash in it H2O H2O Grow plants Grow plants Keep hydrate Keep hydrate Has minerals Has minerals

QUICK LAB: observations What characteristics/ categories can we observe? What characteristics/ categories can we observe? As a class: construct a table As a class: construct a table Complete the table Complete the table Due today Due today

QuickLab: Observations

Physical Property Definition: Definition: Examples: Examples:

Chemical Property Definition: Definition: Examples: Examples:

Begin 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 bowling ball? How can we find the density of a bowling ball?

Vocabulary Words Density Density Mass Mass Volume Volume Physical property Physical property Chemical property Chemical property Weight Weight Mixture Mixture Compound atom Compound atom molecule molecule

Frayer Model