catalyst – october 7(4), 2009 1. write and name the compound formed through beryllium and oxygen....
TRANSCRIPT
Catalyst – October 7(4), 20091. Write and name the compound
formed through Beryllium and Oxygen.
2. Write and name the compound formed between Potassium and Sulfur.
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
Ionic Compound
NaCl Sodium chloride
CaCl2 Calcium chloride
KBr Potassium bromide
MgF2 ???
NaBr ???
Naming Ionic Compounds
1)Write name of first element (metal).
2)Second element ends in -ide.
3)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 CompoundsDo 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 Compounds1) Look up the ions
on the cheat sheet and write the words next to
them.
Naming Ionic CompoundsBaCO3
Naming Ionic CompoundsBaCO3
Normally the first element is the first
piece and the rest is the second piece.
Naming Ionic CompoundsBaCO3
Barium
Naming Ionic Compounds
If the first element is +2, where
should we find the second?(Remember, charges must
balance!)
Naming Ionic CompoundsBaCO3
Barium
Naming Ionic CompoundsBaCO3
Barium Carbonate
Naming Ionic CompoundsAlPO3
Naming Ionic CompoundsAlPO3
Aluminum
Naming Ionic CompoundsAlPO3
Aluminum Phosphite
Naming Ionic CompoundsH3PO4
Naming Ionic CompoundsH3PO4
Hydrogen
Naming Ionic CompoundsH3PO4
Think: H+, we have 3 which
means +3, where will PO4
be?
Naming Ionic CompoundsH3PO4
Hydrogen Phosphate
Naming Ionic CompoundsFeSO4
Naming Ionic CompoundsFeSO4
Notice Iron appears in +2
and +3…
Naming Ionic CompoundsFeSO4
Sulfate
Naming Ionic CompoundsFeSO4
Since Sulfate is -2, Fe must be
+2
Naming Ionic CompoundsFeSO4
Iron(II) Sulfate
Naming Ionic CompoundsFeSO4
Iron(II) Sulfate or
Ferrous Sulfate
Exit Question
What is the formula of the compound form between beryllium and phosphate. Then, name the compound.
What is the formula of the compound formed between sodium and oxygen. Then, name the compound
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)1. Electrons are shared2. Bonds between nonmetals and
non metals3. Usually gases at room
temperature (not crystals )4. Low melting points5. 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
1. Electrons are transferred2. Bonds between metals and
nonmetals3. Make crystals4. High melting points5. Good conductors of electricity
when dissolved
Group Race!
Each group will complete a Double Bubble Diagram…liiiiiike this (Double Bubble doc)
Rules:1. No talking or sharing of notes!2. First person fills in ONE bubble and passes
paper to next person – cannot skip people!3. If next person doesn’t know an answer,
he/she must stand up and do 10 jumping jacks before passing paper.
4. 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
ExamplesH2
F2
HCl (chlorine)
Formation of Single Covalent Bonds
Your Turn!Cl2
HBr
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
ExamplesNH3
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:1. Br2
2. HI3. PH3
4. H2S
5. CCl46. PH3
7. SiH4
Exit Question
1. What are 3 characteristics of covalent compounds?
2. What is one difference between ionic and covalent compounds?
3. Draw the Lewis Dot Structure for Cl2.