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Today’s Agenda Catalyst Review Multiple Bond Formation DHMO Letter Sharing Naming Covalent Compounds Exit Question
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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
Today’s AgendaCatalystReview Multiple Bond Formation
DHMO Letter SharingNaming Covalent CompoundsExit Question
Today’s ObjectivesSWBAT model bond formation for single and multiple covalent bonds.
SWBAT name covalent compounds.
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!
Try these! Write in notes!
1. Se22. CS23. CH2Cl24. Ge2H45. OS6. C2Br67. NOBr
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.
Surprise….I have some DHMO with me today.
Does anyone want to see it??
Naming Covalent
Compounds
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
Ionic Bond Ion: Li Ion: O
Li O
Ionic Bond Ion: Li Ion: O
Li1+ O2-
Ionic Bond Ion: Li Ion: O
Li1+ O2-
Ionic Bond Ion: Li Ion: O
Li2O
Ionic Bond Bohr Model: Li Bohr Model: O
Ionic Bond Bohr Model: Li Bohr Model: O
Ionic Bond Bohr Model: Li Bohr Model: O
Ionic Bond Bohr Model: Li Bohr Model: O
Ionic Bond Bohr Model: Li Bohr Model: O
Naming Ionic CompoundsMgO
Naming Ionic CompoundsMgO
Magnesium Oxide
Naming Ionic CompoundsCaCl2
Naming Ionic CompoundsCaCl2
Calcium Chloride
Naming Ionic CompoundsAl2O3
Naming Ionic CompoundsAl2O3
Aluminum Oxide
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.
Naming Covalent Compounds
PCl3
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!
Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a
prefix.
Naming Covalent Compounds1 – mono- 2 – di-
3 – tri- 4 – tetra-5 – penta- 6 – hexa-7 – hepta- 8 – octa-9 – nona- 10 – deca-
Naming Covalent Compounds
PCl3
Naming Covalent Compounds
PCl3
Phosphorous
Naming Covalent CompoundsRule 2: The
second element always gets a
prefix, uses the root of the word
and ends in-ide.
Naming Covalent Compounds
PCl3
Phosphorous
Naming Covalent Compounds
PCl3
PhosphorousTrichloride
Naming Covalent Compounds
Rule 3: The “o” or “a” at the end of
the prefix is dropped if the
element begins in a vowel.
Naming Covalent Compounds
N2O
Naming Covalent Compounds
Rule 1: If the first element has more than one atom, give it a
prefix.
Naming Covalent Compounds
N2O
Dinitrogen
Naming Covalent CompoundsRule 2: The
second element always gets a
prefix, uses the root of the word and ends in -ide.
Naming Covalent Compounds
N2O
Dinitrogen Monooxide
Naming Covalent CompoundsRule 3: The “o”
or “a” at the end of the prefix is dropped if the element begins
in a vowel.
Naming Covalent Compounds
N2O
Dinitrogen Monooxide
Naming Covalent Compounds
N2O
Dinitrogen Monoxide
Practice Time!
EXAMPLESCCl4As2O
Whiteboards
SO
Sulfur Monoxide
NO2
Nitrogen Dioxide
N2O
Dinitrogen Monoxide
P2O5
Diphosphorous Pentoxide
PCl5
PhosphorousPentachloride
NF3
NitrogenTrifluoride
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
Independent Practice TimeLucky you!
Exit Question1. Write the formula for:
Silicon dioxide Dihydrogen monoxide
2. Write the name for the following compounds:
CO2
NH3