Catalyst – October 9(3), 2009 Write and name the compound formed through Beryllium and Oxygen. Write and name the compound formed between Potassium and.

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Presentation transcript:

Catalyst – October 9(3), 2009 Write and name the compound formed through Beryllium and Oxygen. Write and name the compound formed between Potassium and Sulfur. I hyperlinked the picture of the stopwatch to http://online-stopwatch.com

Today’s Agenda Catalyst Practice Naming Ionic Intro to Covalent Compounds Covalent Bond Formation (more LDS’s!) Project Work Time Exit Question

What do you see? Copy the table into your notes and fill in the question marks with what you think is correct. Formula for Ionic Compound Name for NaCl Sodium chloride CaCl2 Calcium chloride KBr Potassium bromide MgF2 ??? NaBr

Naming Ionic Compounds Write name of first element (metal). Second element ends in -ide. Ignore subscripts!

Naming Ionic Compounds Draw a mental line between the ions. Na+ Cl-

Naming Ionic Compounds Binary Ionic Compound – an ionic compound composed of two elements

Naming Ionic Compounds ZnO

Naming Ionic Compounds ZnO Zinc Oxide

Naming Ionic Compounds CaCl2

Naming Ionic Compounds CaCl2 Calcium Chloride

Naming Ionic Compounds Al2O3

Naming Ionic Compounds Al2O3 Aluminum Oxide

Naming Ionic Compounds Ternary Ionic Compound – an ionic compound with more than 2 elements

Naming Ionic Compounds Ionic Cheat Sheets!

Naming Ionic Compounds Do not lose this…you will need it the rest of your life (in my class).

Naming Ionic Compounds The way you use it…

Naming Ionic Compounds 1) Look up the ions on the cheat sheet and write the words next to them.

Naming Ionic Compounds BaCO3

Naming Ionic Compounds BaCO3 Normally the first element is the first piece and the rest is the second piece.

Naming Ionic Compounds BaCO3 Barium

Naming Ionic Compounds If the first element is +2, where should we find the second? (Remember, charges must balance!)

Naming Ionic Compounds BaCO3 Barium

Naming Ionic Compounds BaCO3 Barium Carbonate

Naming Ionic Compounds AlPO3

Naming Ionic Compounds AlPO3 Aluminum

Naming Ionic Compounds AlPO3 Aluminum Phosphite

Naming Ionic Compounds H3PO4

Naming Ionic Compounds H3PO4 Hydrogen

Naming Ionic Compounds H3PO4 Think: H+, we have 3 which means +3, where will PO4 be?

Naming Ionic Compounds H3PO4 Hydrogen Phosphate

Naming Ionic Compounds FeSO4

Naming Ionic Compounds FeSO4 Notice Iron appears in +2 and +3…

Naming Ionic Compounds FeSO4 Sulfate

Naming Ionic Compounds FeSO4 Since Sulfate is -2, Fe must be +2

Naming Ionic Compounds FeSO4 Iron(II) Sulfate

Naming Ionic Compounds FeSO4 Iron(II) Sulfate or Ferrous Sulfate

Today’s Objectives SWBAT find some atom love! SWBAT state characteristics of covalent compounds. SWBAT model covalent bond formation.

Covalent Compounds in da House! Covalent compounds are EVERYWHERE! Household cleaners (Ammonia) Water! Salad dressing Political debate! (think greenhouse gases)

Find the Characteristics of Covalent Compounds…. Let’s HUNT!

Characteristics of Covalent Compounds (Key Point #1) Electrons are shared Bonds between nonmetals Usually gases at room temperature (not crystals ) Low melting points Poor conductors of electricity

What’s the difference between ionic and covalent compounds? It is important to understand the differences between ionic and covalent compounds Let’s review ionic compound characteristics…

Characteristics of Ionic Compounds Electrons are transferred Bonds between metals and nonmetals Make crystals High melting points Good conductors of electricity when dissolved

Group Race! Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc) Rules: No talking or sharing of notes! First person fills in ONE bubble and passes paper to next person – cannot skip people! If next person doesn’t know an answer, he/she must stand up and do 10 jumping jacks before passing paper. Next person fills in ONE bubble and passes paper to next person…etc!

How do covalent bonds form? Let’s look at Lewis Dot Structures again! Key Point #2: Each atom in a compound satisfies the octet rule. This is shown in a Lewis Dot Structure.

Single Bonds Single covalent bond: one pair of shared electrons (two electrons) Atoms may be the same H2, F2, Cl2, Br2, I2, O2 Atoms may be different HF, HCl, HBr, HI =

Formation of Single Covalent Bonds Examples H2 F2 HCl (chlorine)

Formation of Single Covalent Bonds Your Turn! Cl2 HBr

Hydrogen will NEVER be a central atom! Tricks! Central atom: in the center of a molecule, usually has lower electronegativity Terminal atom: not in the center of a molecule Hydrogen will NEVER be a central atom!

Formation of Multiple Single Bonds Examples NH3 SeCl2

Formation of Multiple Single Bonds Your Turn! NF3 CH4 CH3Cl

Practice Time – Finish for HW! Draw the Lewis Dot Structures for the following covalent compounds: Br2 HI PH3 H2S CCl4 SiH4

Exit Question What are 3 characteristics of covalent compounds? What is one difference between ionic and covalent compounds? Draw the Lewis Dot Structure for Cl2.