Chemistry Week 15 - Weebly

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Chemistry Monday, November 28, 2016

Do-Now: “A-G Overview” 1. Write down today’s FLT

2. What classes do you need to take to graduate from Lawndale?

3.  Are these requirements the same or different than college requirements?

4. When you apply to colleges, what can they see from your transcript?

Take out your planner and ToC

Announcements • ROCKSbuybacktomorrow• Usedojopoints• Unit3ExamnextweekJ

– Ch.5,6,7,8•  Finals

– Oddperiods12/15– Evenperiods12/16

Planner: •  Packet & Study for Unit test + final exam •  12/1 retake/make-up deadline

Table of Contents #3: 15. A-G Overview

FLT •  I will be able to describe the differences

between HS graduation and CSU/UC requirements by completing A-G Overview

Standard N/A

Use this paper for A-G Requirements

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A-G Requirements •  a – History/Social Science (Swearingen) •  b – English (Pina) •  c – Math (Schulze) •  d – Science (Schulze) •  e – Language (Swearingen) •  f – Arts (Pina) •  g – Electives (Hicks)

Use this paper for Reading Transcripts

Reading a Transcript • Highlights

– A/UC and B/UC – Sem 1 and Sem 2 – Credit Counts – Current Schedule

Reading a Transcript • GPAs

– Where are they? – Unweighted – Weighted – Cal Grant

LookatStudentx’stranscript

1) Counta-GClasses2) HowmanyAPclasses

didStudentxtake?3) WhatwasStudentX

rankinginhis/herClass?

4) PredictwhatschoolsStudentwasaccepted

intO.

15 A-G Classes

Required To apply for Cal States

and UC

UNIVERSITIES

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One year of world or European history One year of U.S. History AP/IB classes accepted

Does “2 Years Required” mean that it’s the recommended number?

No more than one year of ESL-type courses may be counted towards this

requirement

Including advanced algebra and geometry

Foundational subjects: biology

chemistry, physics

Sign language and classical languages (Latin and Greek) are accepted

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Dance, drama/theater, music, or visual art May be chosen from arts, social science,

English, advanced mathematics, laboratory sciences, and languages

AP Scores Credit Recovery Options •  Summer School •  E2020 • Adult School • Community College

•  Note: Counselors refer to and counsel on these options. Please defer to counselors for student guidance in this area.

Connecting with a Counselor •  Call Lorri Peterson (x3105) •  Counselors

– Swearingen: BCA & A-Garcia, G – Hicks: AMA & Garcia, J. – Lopez, K. – Pina: ASLA & 9th Grade – Rojas: AVID & Lopez, R. – Portillo – Schulze: MSA & Prado – Z

SAT and ACT Tests • You can take the tests multiple times •  I had to pay…at Lawndale you can get

a fee waiver from Mr. Orendain

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Other Notes

• Educational Prep Programs • Volunteer & Community Service

• Work Experience • Sports/Extra-curriculars • Awards & Honors

On Paper 1.  Identify two differences between

graduation and A-G requirements. 2.  In what ways are you meeting

graduation and A-G requirements? 3.  If you could improve your transcript,

what would you do and why? 4.  Explain what can make a student a

competitive UC/CSU applicant in 3-5 sentences

Finished? Quietly work on stamps or read Ch. 8

Chemistry Tuesday, November 29 – Wednesday,

November 30, 2016

Do-Now: “BrainPOP: Chemical Bonds” 1. Write down today’s FLT

2.  Distinguish between an ionic bond and a metallic bond.

3.  Can calcium and phosphorous form an ionic bond? Why or why not?

4. Write down the formula for calcium phosphide.

5. What are the four types of orbitals in an atom?

Take out your planner and ToC

Announcements • Unit3ExamnextweekJ

– Ch.5,6,7,8• Finals

– Oddperiods12/15– Evenperiods12/16

Planner: •  Finish SA • Catch up on stamps

Table of Contents #3: 15. A-G Overview 16.  BrainPOP: Chemical Bonds 17.  8.1 Cornell Notes

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BrainPOP:ChemicalBonds• WatchtheBrainPOPvideo• ANerthevideo,answerthequesPonsinyourgroup–everymembermustcopydownthesameanswer

• Thegroupwiththemostcorrectanswersà+5dojopointseach

hOps://www.brainpop.com/science/maOerandchemistry/chemicalbonds/

FLT •  I will be able to describe the

arrangement of atoms in a covalent bond by completing 8.1 Cornell Notes

Standard HS-PS1-1:UsetheperiodictableasamodeltopredicttherelaRveproperResofelementsbasedonthepaOernsofelectronsintheoutermostenergylevelofatoms.

8.1: Covalent Bonding

Recall

Compounds •  Compounds = substances made of

atoms of 2+ elements chemically combined in fixed ratios

Examples: MgCl2 H2O

Mg(NO3)2

Compounds •  Compounds are held together by

chemical bonds

CH4

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Compounds •  There are different types of chemical bonds,

including… –  Ionic

Covalent

– Metallic

Ionic vs. Covalent Bonds •  Ionic bonds involve the transfer of vse-s (gained or lost)

Ø  Forms salts Ø  Metal + Nonmetal

Ionic vs. Covalent Bonds •  Covalent bonds involve the sharing of vse-s.

Ø  Forms molecules (molecular compounds)

Ø  Nonmetals

Check-In Would the following pairs of atoms most likely form a covalent or an ionic bond? 1.  N and O 2.  Na and O 3.  Al and Cl 4.  H and Cl

Covalent Bonds •  Two electrons shared together have the

strength to hold two atoms together in a bond.

•  Covalent bonds may form between atoms of the same element or different elements – H2 – O2 – CO2 – C6H12O6

Molecules § Manyelementsarenaturallyfoundasmolecules(covalentlybondedatoms)

§ Diatomicmolecules=twocovalentlybondedatoms(ex/N2)

§ Ex/Aircontainsoxygenmolecules,whicharediatomic(O2)

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How does H2 form?

•  The nuclei repel each other, since they both have a positive charge (like charges repel).

++

(diatomic hydrogen molecule)

+ +

How does H2 form?

++

• But, the nuclei are attracted to the electrons

•  They share the electrons, and this is called a �covalent bond�, and involves only NONMETALS!

Covalent Bonds: Recap •  When nonmetals bond, they hold on to

their own valence e-s •  In order to achieve a noble gas

configuration, they share their valence e-s with other nonmetals (covalent bonding)

Covalent bonding

•  Fluorine has seven valence electrons (but would like to have 8)

F

Covalent bonding

•  Fluorine has seven valence electrons

•  A second atom also has seven

F F

Covalentbonding● Fluorinehassevenvalenceelectrons● Asecondatomalsohasseven● Bysharingelectrons…

F F

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F F


F F


F F


F F

Covalentbonding●  Fluorinehassevenvalenceelectrons

● Asecondatomalsohasseven

● Bysharingelectrons…

● …bothendwithfullorbitals

F F





F F 8Valenceelectrons

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F F8Valenceelectrons

Covalentbonding● Drawthisexample:

F2

F F

Molecular Compounds •  Properties: •  Strong bond •  Tend to have lower melting and boiling

points than salts •  Typically liquids or gases at room

temperature – Recall: salts are typically solids

Molecular Compounds •  Molecular formulas = show the # of

atoms of each element in a molecule •  Ex/

H2O CO2

C2H6O

Molecular Compounds •  What would the formula be for this

molecule?

Pair-Share-Respond1.   Whathappenstothevalenceelectrons

inionicbonding?2.   Whathappenstovalenceelectronsin

covalentbonding?3.   Anionicbondoccursbetween_____

and______4.   Acovalentbondoccursbetween_____

and_____5.   Definetheterm“molecule”

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CW1.   Pg.216:8.1SecPonAssessment1-6

–  Samepaperasyournotes

2.   Read8.2-8.3–harder!–  LastsecPonsbeforetheexam

3.   Finished?WorkonToCorstudyquietly

Chemistry Thursday, December 1– Friday, December 2,

2016

Do-Now: “8.2/8.3 Cornell Notes” 1. Write down today’s FLT

2.  Remind me: how can you tell if atoms will form an ionic or a covalent bond?

3.  Draw the electron dot diagram for Sulfur. 4.  Use a pro-talk sentence frame to explain

the concept of covalent bonding. Take out your planner and ToC

Announcements • Unit3ExamnextweekJ

– Ch.5,6,7,8• Monday12/12willbeallperiods(nolatestart)

• Finals– Oddperiods12/15– Evenperiods12/16

Planner: •  All stamps by end of next week! •  Schedule final ahead of time if you will be

absent

Table of Contents #3: 18.  8.2/8.3 Cornell Notes 19.  Lewis Structure WS

FLT •  I will be able to describe the arrangement

of electrons covalent bonds using lewis dot structures by completing 8.2/8.3 Cornell Notes

Standard HS-PS1-1:UsetheperiodictableasamodeltopredicttherelaRveproperResofelementsbasedonthepaOernsofelectronsintheoutermostenergylevelofatoms.

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8.2/8.3: The Nature of Covalent Bonding

Recall

Recall • Compounds are held together by

chemical bonds •  Ionic Bond = electrostatic attraction

due to the transfer of vse-s between a metal and nonmetal

• Covalent Bond = formed from the sharing of vse-s between nonmetals

Molecules vs. Salts • NaCl • KBr • CO2 • HBr • NH3 • AlCl3

Single, Double, Triple Bonds

Single, Double, Triple Bonds • Covalent Bonds involve the sharing

of valence electrons •  These electrons form strong single,

double, or triple covalent bonds between the atoms

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Single Bonds •  Single Bonds = Formed when atoms

share one pair of vse-s (2 total) •  Drawn as a line between atoms

•  Ex:

Single, Double, Triple • However, sometimes atoms can

share more than one pair of electrons.

• When this happens, double or triple bonds form.

Single, Double, Triple •  Double Bonds = atoms share two

pairs of vse-s (4 total) •  Stronger and shorter than single bonds •  Noted as two lines

Single, Double, Triple •  Triple Bonds = atoms share three

pairs of vse-s (6 total) •  Strongest, shortest, and most rigid •  Noted as three lines

Lewis Structures

Remind me… • How any valence electrons in… 1.  Li 2.  S 3.  Al 4.  Br 5.  Sr

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Lewis Structures • We can

represent the covalent bonding patterns in atoms using Lewis structures

Rules for Drawing Lewis Structures 1.  Determine the total # of vse-s

ex/ PBr3

Rules for Drawing Lewis Structures 2. Place most metallic atom in center and connect with single bonds. Carbon is always in the center if present. Hydrogen is never in the center.

Rules for Drawing Lewis Structures 3. Use remainder of vse-s to fill in octets around outer atoms* *Atoms in 1s or 2s, like H, can only have 2 e-s

Rules for Drawing Lewis Structures 4. Place extra vse-s around the central atom

Rules for Drawing Lewis Structures 5. If you run out of vse-s, form double or triple bonds ex/ C2H4

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Extra Notes • Never add extra vse-s to H

Extra Notes • Charges must be +/- from total

vse-s • Ex/ NO3

-

Extra Notes •  Indicate charges with brackets • Ex/ NO3

-

Extra Notes • Resonance occurs when there are

multiple possible structures • Ex/ NO3

-

Extra Notes •  There are always exceptions

Extra Notes • Boron is a moron

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Try This: SiBr4

1.  Find the total number valence electrons

2.  Draw the Lewis structure 3.  Compare with your neighbor

CW1.   LewisStructureWS2.   StudyCh.83.   Finished?WorkonToCorstudy

quietly

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Chemistry Week 15 - Weebly