take out dhmo letter please
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Today’s Agenda Catalyst Review Multiple Bond Formation DHMO Letter Sharing Naming Covalent Compounds Exit QuestionTRANSCRIPT
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Catalyst – October 23+6, 2009
Take out DHMO letter please.
Model the formation of the following compound: H2S
Draw the Lewis Structure for P2
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Today’s AgendaCatalystReview Multiple Bond Formation
DHMO Letter SharingNaming Covalent CompoundsExit Question
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Today’s ObjectivesSWBAT model bond formation for single and multiple covalent bonds.
SWBAT name covalent compounds.
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Steps for Multiple Bond LDS’s1. Write formula2. Number of valence electrons
(ve-)3. Number of octet electrons (oe-) 4. Number of bonds = [(oe-) – (ve-)]/25. Draw LDS!
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Try these! Write in notes!
1. Se22. CS23. CH2Cl24. Ge2H45. OS6. C2Br67. NOBr
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The Environment… In this class, I want you to learn the
contents of basic chemistry… However, I also want you to be able to
understand the importance of chemistry in the environment.
There is a chemical, DHMO, that is especially ruining our environment in many ways… and something must be done.
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Surprise….I have some DHMO with me today.
Does anyone want to see it??
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Naming Covalent
Compounds
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A compound made from Lithium and Oxygen.
How do we know if it is ionic or covalent? Metals and non-metals make ionic compounds.
Naming Ionic Compounds
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Ionic Bond Ion: Li Ion: O
Li O
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Ionic Bond Ion: Li Ion: O
Li1+ O2-
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Ionic Bond Ion: Li Ion: O
Li1+ O2-
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Ionic Bond Ion: Li Ion: O
Li2O
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Ionic Bond Bohr Model: Li Bohr Model: O
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Ionic Bond Bohr Model: Li Bohr Model: O
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Ionic Bond Bohr Model: Li Bohr Model: O
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Ionic Bond Bohr Model: Li Bohr Model: O
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Ionic Bond Bohr Model: Li Bohr Model: O
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Naming Ionic CompoundsMgO
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Naming Ionic CompoundsMgO
Magnesium Oxide
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Naming Ionic CompoundsCaCl2
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Naming Ionic CompoundsCaCl2
Calcium Chloride
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Naming Ionic CompoundsAl2O3
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Naming Ionic CompoundsAl2O3
Aluminum Oxide
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Naming covalent compounds No Kriss Krossing!
I will provide you with the compound’s formula.
However, naming will be a tiny bit more difficult.
In your notes, do this first example with me.
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Naming Covalent Compounds
PCl3
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How do we know if this is a covalent compound?Is it between a metal and a nonmetal? NO!!! Then, it is not ionic.
Is it between a nonmetal and a nonmetal? YES!!! Then, it is covalent!
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Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a
prefix.
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Naming Covalent Compounds1 – mono- 2 – di-
3 – tri- 4 – tetra-5 – penta- 6 – hexa-7 – hepta- 8 – octa-9 – nona- 10 – deca-
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Naming Covalent Compounds
PCl3
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Naming Covalent Compounds
PCl3
Phosphorous
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Naming Covalent CompoundsRule 2: The
second element always gets a
prefix, uses the root of the word
and ends in-ide.
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Naming Covalent Compounds
PCl3
Phosphorous
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Naming Covalent Compounds
PCl3
PhosphorousTrichloride
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Naming Covalent Compounds
Rule 3: The “o” or “a” at the end of
the prefix is dropped if the
element begins in a vowel.
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Naming Covalent Compounds
N2O
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Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a
prefix.
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Naming Covalent Compounds
N2O
Dinitrogen
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Naming Covalent CompoundsRule 2: The
second element always gets a
prefix, uses the root of the word and ends in -ide.
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Naming Covalent Compounds
N2O
Dinitrogen Monooxide
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Naming Covalent CompoundsRule 3: The “o”
or “a” at the end of the prefix is dropped if the element begins
in a vowel.
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Naming Covalent Compounds
N2O
Dinitrogen Monooxide
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Naming Covalent Compounds
N2O
Dinitrogen Monoxide
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Practice Time!
EXAMPLESCCl4As2O
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Whiteboards
SO
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Sulfur Monoxide
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NO2
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Nitrogen Dioxide
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N2O
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Dinitrogen Monoxide
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P2O5
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Diphosphorous Pentoxide
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PCl5
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PhosphorousPentachloride
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NF3
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NitrogenTrifluoride
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Writing Formulas from NamesEXAMPLES• Carbon
tetrachloride• Diarsenic
trioxide• Sulfur dioxide• Nitrogen
trifluoride
YOUR TURN TO “FORMULIZE”
1. Sulfur trioxide2. Carbon
monoxide3. Carbon dioxide4. Boron trifluoride5. Tetraphosphorus
hexasulfide6. Xenon difluoride
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Independent Practice TimeLucky you!
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Exit Question1. Write the formula for:
Silicon dioxide Dihydrogen monoxide
2. Write the name for the following compounds:
CO2
NH3