1 / 10

BONDING TYPES ctnd .

BONDING TYPES ctnd . What is covalent bonding? What is metallic bonding? How do you name or write covalent compounds?. BONDING TYPES. Ionic  stealing, transfer of electrons Covalent  sharing of electrons

zorana
Télécharger la présentation

BONDING TYPES ctnd .

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BONDING TYPES ctnd. What is covalent bonding? What is metallic bonding? How do you name or write covalent compounds?

  2. BONDING TYPES • Ionic  stealing, transfer of electrons • Covalent  sharing of electrons • Metallic bonds are attractions of floating valence e- to other positively charged cations (Sea of electrons, drifter) Watch Video: Common Types of Atomic Bonds http://aaronfreeman.wikispaces.com/file/view/Common_Types_of_Atomic_Bonds.mov

  3. Ionic or Covalent? • How can I easily determine if a substance is ionic or covalent? • By calculating difference in electronegativity! • Rule of Thumb – Magic Number = 1.67 • If the difference is > 1.67 IONIC < 1.67 COVALENT = 1.67 50% Ionic and 50% Covalent

  4. ELECTRONEGATIVITY VALUES

  5. EXAMPLES • EX. Examine electronegativity between F and Cs F = 4.0 Cs = .7 |4.0 - .7| = 3.3 so …. IONIC COMPOUND Practice • Ca and Cl Ca = 1.0 Cl = 3.0 • Difference is 2.0 so Ionic Compound • S and O S = 2.5 O = 3.5 • Difference is 1 so Covalent Compound

  6. COVALENT COMPOUNDS • Molecules neutral group of atoms held together by covalent bonds • Molecular/Covalent Compounds compound whose simplest units are molecules • Low melting/boiling points • Made from two nonmetals • EX. H2O water CO2 carbon monoxide

  7. MOLECULES

  8. MOLECULAR FORMULA • Molecular Formula chemical formula of covalent cmpd • Actual number of atoms in each molecule • Does NOT tell us about arrangement of atoms • H2O : 2 atoms of H 1 atom of O • C2H6 : 2 atoms of C 6 atoms of H

  9. NAMING MOLECULAR COMPOUNDS • DO NOT USE CHARGES!!!! • USE PREFIXES AND SUFFIXES  tells how many atoms of each element are present in each molecule of the compound • How would you name? CO2 or SO3 Carbon Dioxide Sulfur Trioxide

  10. NAMING MOLECULAR COMPOUNDS If covalent: use prefixes • OMIT the prefix mono- if the first atom is = 1 p.269 • ADD suffix to the second element of –ide • SF6 • Cl2O8 • SO3 • ICl4 • P2O5 • Carbon Tetraiodide • Phosphorus Trichloride • DinitrogenTrioxide • Br2 I2 O2 Sulfur Hexafluoride DichlorineOctoxygen …. NOT Octa-oxygen Sulfur Trioxide Iodine Tetrachloride DiphosphorusPentoxide … NOT Penta-oxide CI4 PCl3 N2O3 Oxygen Bromine Iodine

More Related