Practice Drawing Lewis Dot Structures at the top margin of page 4 H Na Cl What does the number...

Practice Drawing Lewis Dot Structuresat the top margin of page 4

H

Na

Cl

What does the number of dots around the atomic symbol represent??The number of valence electrons

The Rule of

8

Atoms tend to gain, lose, or share electrons until

they have eight valence electrons.

Lewis Dot Structure Structural Formula

Cl

Covalent bonds are formed between non-metals and non-metals

ClH

HChlorine and Hydrogen will

share their electrons

Note: Hydrogen is content with 2 electrons, not 8.

H-Cl

Lewis Dot Structure Structural Formula

Bonding Pair- pairs of shared electrons within the molecule

Lone Pair- a pair of electrons in the valence shell of an atom that does not participate in bonding Single bonds occur when a single pair of

electrons are shared between atoms

NH H

HN HHH

Ex: NH3

Ammonia

N HHH

H2 H H H H H-H

Cl2Cl Cl

Cl ClCl-Cl

Hydrogen Gas

Chlorine Gas

Double Bonds occur when atoms share two pairs of electrons

O O O O

Ex: O2

Oxygen gas

O=O

Triple Bonds form when atoms share three pairs

of electrons

Ex: N2

Nitrogen gas

N NN N

N N

O=C=O

H-O-H

Carbon dioxide

Water

O OC

ACC: Dimethyl ether Structural Formula

http://www.google.com/imgres?imgurl=http://upload.wikimedia.org/wikipedia/commons/0/0e/Dimethyl-ether-2D-flat.png&imgrefurl=http://commons.wikimedia.org/wiki/File:Dimethyl-ether-2D-flat.png&h=662&w=1100&sz=9&tbnid=rh6RPTphxkrCCM:&tbnh=90&tbnw=150&prev=/images?q=dimethyl+ether&usg=__qq9hvRWAowvap26ug-kzNYaaRUA=&ei=gH6ZS56KNomQNt6qrXs&sa=X&oi=image_result&resnum=5&ct=image&ved=0CBsQ9QEwBA

Bellwork: Monday 3/26/2012Count the atoms of each element in the

following: Na2SO4

(2) Sodium, (1) Sulfur, (4) Oxygen 2Al2(CO3)2

(4) Aluminum, (4) Carbon, (12) Oxygen

Draw the Lewis Dot Structure and Structural Formula for Chlorine gas (Cl2)

Monday 3/26/2012 Finish hanging any projects that are left!

Nothing can be on the back two tables because we need them for our periodic table made out of tissue boxes!

Presentation Element Name / Molecule NameAtomic Symbol / Molecular formulaAtomic Number / Total Molecular weight2 Interesting Facts

○ Origin of name? Uses? Cool things or facts? Etc.

○ NOT malleable, luster, number of orbitals, etc.

Presentation Order P1 Allison Juliet Joey Nicole Kassandra Andrew Jristin Austin Tim Fred Michael Sierra Natalie Lyndsie

Joseph Destiny Brianna Caity Sam Jade Donovan Jordan Katrina Cassidy Brenden Quinn Cecelia

If you don’t have your 3D

model, you don’t present!

Presentation and model will be LATE!

Presentation: • Element Name /

Molecule Name• Atomic Symbol /

Molecular formula• Atomic Number / Total

Molecular weight• 2 Interesting Facts

• Origin of name? Uses? Cool things or facts? Etc.

• NOT malleable, luster, number of orbitals, etc.

Presentation Order P2 Angelo Gary Sabrina Ronnie Bryan H. Leslie Megan Michael Vizzi Brian C. Angie Bianca Ty Scarlett Logan

Robbie Richard Marukh Chris Rachael Kyle Sean Vanessa Austin Wesley Trey Savanna Jordan Mike Verrochi










Presentation Order P3 Mary Ann Isaiah Andrew Kolton Dylan M. Brooke Priscilla Kristina Brooklyn Allison Austin McKenzie Fermin Adela Joey

Michael R. Dawson Angelica Jasmine Jordan H. Sam Dylan P. Michael C. Joseph Lindy Adam Tiffany Isabel Jordan W. Jon Jon Charlie










Presentation Order P5 Ean Elizabeth Michael Derek Riley Matt Josh Taylor Brody Gloria Maddie Alyssa Steven Maxine Kellie Liya John Rachel

Hayden Trev Mason Andrew Nikki Brian Carolina Vanessa Kahlil Issac Edrian Sierra Allie Wendy Justin Cerys Gracyn Cameron










Presentation Order P6 Abby Riley H. Sarah Paloma Francis Edward Graham Celia Dani Cassidy Mackenzie Carlson Jake

Linh Aspen Steven Riley C. Alex Kylee Christina Paige Alissa Nate Haley Nidia James










Practice Drawing Covalent Bonds Using the

transparent cards on the table, show how the electrons can be shared in the following covalent bonds:I2Cl2CO2

H2O

O2

N2

Remember: the electrons MUST be between the symbols. You also can only have 2 on each side…So you may need to turn and twist the pictures until it looks the way it should!

NO Bell Work: Tuesday 3/27/2012 Interims today! All you need is a

pencil and a scantron. Good luck! When you are done, you may read a science magazine, read a book, or work on homework for other classes.

Don’t forget! Your tissue box is DUE THURSDAY!!

Period 2 – Once you finish, if you have not presented, come up to me so you can present

Bellwork: Wednesday 3/28/2012Draw the Lewis

Structure and Structural Formula for:

1. CH4

2. NF3

3. HI

HH H

HC

CH

H HH

FF FN N

FF F

HI I H

What is in a name? A chemical formula tells

what elements are in a compound, and the exact number of atoms of each element needed. Ex: NH3, H2O

Covalent bonds and Ionic bonds are named in different ways, but both show the elements and numbers of atoms in their own ways

Name this compound:

Ba(Na)2 Answer:

Banana!

The first atom listed… Is capitalized Is written as the name of that elementIncludes a prefix if there are more than one of that atom

The second element…Is written in lowercaseMay include a prefix to tell how many atoms there areIs shortenedEnds in the suffix “-ide”

Ex: CO2

…is Carbon dioxide

chlorine

sulfurnitrogenfluorine

chloridesulfidenitridefluoride

When shortening a name:Eliminate the second syllable at the first vowelExchange this for the suffix “-ide”

bromine

oxygen

hydrogen

iodine

bromide

oxide

hydride

iodide

Br

O

H

I

Number Prefix Example Name

1- 1st None used n/a n/a

1- 2nd O

2 O2

3 H3

4 Cl45 O5

6 Cl67 S7

8 Br8

9 H9

10 C10

penta-

di-

tri-

tetra-

deca-

hexa-

hepta-

octa-

nona-

mono- (use only for Oxygen)

monoxide

dioxide

trihydride

tetrachloride

pentoxide

hexachloride

heptasulfide

octabromide

nonahydride

decacarbide

p oxide

P2O5

Diphosphorous• Is capitalized • Is written as the name of that

element•Includes a prefix if there are more than one of that atom

• Written in lowercase• With a prefix to tell how

many atoms there are• Shortened, and ends in the

suffix “-ide”

ent

Naming Diatomic Covalent Molecules

O2

Oxygen gas F2

Fluorine gas Br2

Bromine gas

I2Iodine gas

N2

Nitrogen gas Cl2

Chlorine gas

Even though the following gases travel in pairs (diatomic)…their names are

simple…

Naming Covalent Bonds Practice Problems: CO

Carbon monoxide

CO2 Carbon dioxide

PBr3

Phosphorous tribromide

CCl4Carbon

tetrachloride

XeF3

Xenon trifluoride AsI3

Arsenic triodide IF5

Iodine pentafluoride

N2S5

Dinitrogen pentasulfide

Example #1-Names to Formulas

Sulfur trioxide

S O1 32. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is implied

and not written


Dichlorine heptaoxide

Cl O2 72. Write number of atoms


Final Formula


Oxygen difluoride

O F1 22. Write number of atoms


Final FormulaIf no prefix, then 1 is

implied and not written


Dinitrogen tetraoxide

N O2 42. Write number of atoms


Final Formula


Phosphorus pentachloride

PCl1 52. Write number of atoms



and not written


Dinitrogen monoxide

N O2 12. Write number of atoms



and not written


Carbon monoxide

C O1 12. Write number of atoms



and not written


Sulfur hexafluoride

S F1 62. Write number of atoms



and not written

Practice Drawing Lewis Dot Structures at the top margin of page 4 H Na Cl What does the number...

Documents

Transcript of Practice Drawing Lewis Dot Structures at the top margin of page 4 H Na Cl What does the number...