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Practice Drawing Lewis Dot Structures at the top margin of page 4

Practice Drawing Lewis Dot Structures at 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. UFC OCTagon.

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Practice Drawing Lewis Dot Structures at the top margin of page 4

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  1. 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

  2. The Rule of 8 Atoms tend to gain, lose, or share electrons until they have eight valence electrons. UFC OCTagon OCTet Rule OCTapus OCTomom OCTagon

  3. Building Covalent Bonds • Note: Hydrogen is content with 2 electrons, not 8. • Covalent bonds are formed between non-metals and non-metals Cl H H-Cl Chlorine and Hydrogen will share their electrons Cl H

  4. Drawing Covalent Bonds • 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 bondsoccur when a single pair of electrons are shared between atoms Ex: NH3 Ammonia H H H H H N H H N H N H

  5. Hydrogen Gas H H H H2 H H-H Chlorine Gas Cl Cl Cl2 Cl Cl-Cl Cl

  6. Building Covalent Bonds Double Bonds Ex: O2 Oxygen gas • Double Bonds occur when atoms share two pairs of electrons O O O O O= O

  7. Building Covalent Bonds Triple Bonds Ex: N2 Nitrogen gas • Triple Bondsform when atoms share three pairs of electrons N N N N N N

  8. Carbon dioxide O=C=O O C O Water H-O-H

  9. ACC: Dimethyl ether Structural Formula

  10. Bellwork: Monday 3/26/2012 Count 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 Structureand Structural Formula for Chlorine gas (Cl2)

  11. 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 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.

  12. Presentation Order P1 • 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. • 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

  13. Presentation Order P2 • 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. • 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

  14. Presentation Order P3 • 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. • 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

  15. Presentation Order P5 • 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. • 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

  16. Presentation Order P6 • 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. • 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

  17. Practice Drawing Covalent Bonds • Using the transparent cards on the table, show how the electrons can be shared in the following covalent bonds: • I2 • Cl2 • CO2 • 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!

  18. 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

  19. Bellwork: Wednesday 3/28/2012 H Draw the Lewis Structure and Structural Formula for: • CH4 • NF3 • HI H H C H H F F H N C I H F F H H F F N H I

  20. 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

  21. What's In a Name? • Name this compound: Ba(Na)2 Answer: Banana!

  22. Naming Covalent Compounds- page 5 Ex: CO2 • The first atom listed… • Is capitalized • Is written as the name of that element • Includes a prefix if there are more than one of that atom • The second element… • Is written in lowercase • May include a prefix to tell how many atoms there are • Is shortened • Ends in the suffix “-ide” …is Carbon dioxide

  23. Changing/Transforming an Element’s Name chlorine • When shortening a name: • Eliminate the second syllable at the first vowel • Exchange this for the suffix “-ide” chloride sulfur sulfide nitrogen nitride fluorine fluoride

  24. How to Shorten a Name bromine bromide Br O H I oxygen oxide hydrogen hydride iodine iodide

  25. mono- (use only for Oxygen) monoxide di- dioxide tri- trihydride tetrachloride tetra- Adding Prefixes penta- pentoxide hexa- hexachloride hepta- heptasulfide octabromide octa- nonahydride nona- decacarbide deca-

  26. How to Write the Name... P2O5 Di phosphorous p ent ox ide • 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”

  27. Naming Diatomic Covalent Molecules • O2 • Oxygen gas • F2 • Fluorine gas • Br2 • Bromine gas • I2 • Iodine gas • N2 • Nitrogen gas • Cl2 • Chlorine gas Even though the following gases travel in pairs (diatomic)…their names are simple…

  28. Naming Covalent Bonds Practice Problems: • CO • Carbon monoxide • CO2 • Carbon dioxide • PBr3 • Phosphorous tribromide • CCl4 • Carbon tetrachloride • XeF3 • Xenon trifluoride • AsI3 • Arsenic triodide • IF5 • Iodine pentafluoride • N2S5 • Dinitrogenpentasulfide

  29. Example #1-Names to Formulas Sulfur trioxide 1. Write symbols of elements S O 1 3 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

  30. Example #2-Names to Formulas Dichlorineheptaoxide 1. Write symbols of elements Cl O 2 7 2. Write number of atoms Final Formula

  31. Example #3-Names to Formulas Oxygendifluoride 1. Write symbols of elements O F 1 2 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

  32. Example #4-Names to Formulas Dinitrogentetraoxide 1. Write symbols of elements N O 2 4 2. Write number of atoms Final Formula

  33. Example #5-Names to Formulas Phosphoruspentachloride 1. Write symbols of elements P Cl 5 1 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

  34. Example #6-Names to Formulas Dinitrogen monoxide 1. Write symbols of elements N O 1 2 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

  35. Example #7-Names to Formulas Carbon monoxide 1. Write symbols of elements O C 1 1 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

  36. Example #8-Names to Formulas Sulfur hexafluoride 1. Write symbols of elements F S 1 6 2. Write number of atoms If no prefix, then 1 is implied and not written Final Formula

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