Unit 2 Notes #2
Ionic Bonding
In your own words, what is a bond?
Tell me…
Video & Demo:
 What
do the elements
Cl & Na do on their
own?
 Sodium
 Chlorine
Need a volunteer…
A BRAVE one 
 Why
did the student not die??
Need a volunteer…
A BRAVE one 
CHEMICAL BOND
• Chemical Bond: the attractive
force that holds two atoms together
(involves valence e-)
• Compound: two or more elements
chemically bonded together
Types of Chemical Bonds
3 types:
1. Ionic Bond
2. Covalent Bond
3. Metallic
Bond Type #1:
IONIC BOND
•Ionic bond: A bond formed between
two (or more) ions by the transfer of
electrons.
•Formed between a metal & nonmetal
•When two or more ions are bonded
together it’s called a COMPOUND.
Ions
 Ion:
a charged atom
◦ Cation = positive (+) charge
◦ Anion = negative(-) charge
Ionic Compounds
 All
Compounds have an overall
charge of zero.
 Cations give their electrons to
Anions in a ionic bond:
CATIONS ARE ALWAYS
LISTED FIRST!
Practice:
Remember: CATions are listed FIRST
EX: Na ion + Cl ion  _____________
EX: Mg ion + O ion  _____________
EX: What about Mg & Cl?
Writing Ionic
Formulas
Simple Rule: Balance out the + and –
ion charges so they equal zero (0).
◦ ex: Na1+ + Cl 1◦ ex: Mg2+ + O2-
Writing Compound
Formula’s
Simple Rule: Balance out the + and –
ion charges so they equal 0.
Ex: Mg & Cl
•
•
You need 2 Cl1- to balance out the
Mg2+
Mg2+ Cl1- Cl1-  MgCl2
Wanna know a Short
Cut for Writing Ionic
Formulas?
Kris Kross Method!
2+
3Ca As
Ca3As2
Just kris kross the +
and the - charges,
then reduce!
2+
1Mg Cl
3+
2Al O
MgCl2
Al2O3
Review
• An ionic bond is formed between a
____________ and _____________ element
• A compound is two elements
__________________ together
• Why do elements form compounds?
Tweet it!
• Write a TWEET/Facebook status about what
you learned today – short, to the point
• Adding a picture is optional 
PRACTICE: 5MIN
Work on Ionic Compounds on ws
How do you name Simple Ionic
Compounds?
If the compound is ionic, there are two rules
for naming it:
cation first.
Rule #1: Name the _______
anion
Rule #2: Name the _______,
and change the
ending to –ide
PRACTICE: 10 MIN
WORK ON QUESTIONS ON WORKSHEET.
Do Now:
9/20
Write the final formula for:
Na+1 + F-1
2. Ca+2 + N-3
3. Al+3 + O-2
1.
_______
________
________
HW: Finish Ion Naming Wst (BACK)
Due Thur
CLARIFICATION
Fe (III) =
+3
Fe
Always a cation (positive)
Bonding Notes #3:
IONIC NOMENCLATURE
(Naming)
October 11-12, 2010
How do you name Simple
Ionic Compounds?
 If
the compound is ionic, there are two
rules for naming it:
cation first.
Rule #1: Name the _______
anion
Rule #2: Name the _______,
and change
the ending to –ide
EQUATION:
+1
-1
Na + Cl
Sodium
NaCl
Chlorine
NAME:
Sodium Chloride
COMPETITION:
ELEMENT SYMBOL
2. CHARGES
3. COMPOUND (KRIS CROSS)
4. NAME IT
1.
Catalyst
Name the following
compounds:
NaF
BaCl2
Al2O3
BN
Write the formula for
the compound that
forms when
magnesium reacts
with bromine.
October 11
Agenda:
1. Notes
2. Group Competition
3. Independent
Practice
HW Write in Planner:
Ionic Formula WS #4
AND
Polyatomic Ions
Naming Notes Part 2:
Polyatomic Ions &
Transition Metals
Polyatomic Ions are atoms that
combine and react as a group. The
Charge applies to the ENTIRE group.
MEMORIZE THESE!!!
1. Ammonium
: NH4+
2. Hydroxide:
OH3. Nitrate:
NO3-
4. Sulfate:
SO425. Carbonate:
CO326. Phosphate:
PO43-
DON’T EVER CHANGE THE SUBSCRIPT!!!
Ohana means family. Family
means no one gets left behind
- Stitch
(
)
Sulfate:
(SO4)2-
Bonding Rules for Polyatomics
1. Balance the charges between ions (like
before)
2. The entire group acts like one ion
-Use parenthesis if you need more than 1
polyatomic ion (Don’t Change Subscript!):
Ex: 2 NO3 = (NO3)2
Try: 3 CO3 = _____
2 PO4 = _____
1+
Na
with CO3
2-
Na2CO3
3+
Al
with SO4
2-
Al2(SO4)3
NH4 with CO3
+
2-
(NH4)2CO3
Polyatomic Ions Practice
(Remember: The entire group acts like
one ion)
 Practice:
K+ + OH-
KOH
Na+ + SO4-2
Na2SO4
Ca+2 + OH-
Ca(OH)2
potassium
hydroxide
sodium
sulfate
calcium
hydroxide
Do Now:
9/22
Write the 6 equation for these polyatomic ions:
1. Ammonium
2. Sulfate
3. Nitrate
4. Carbonate
5. Hydroxide
6. Phosphate
HW: Write Name and Formula of polyatomic
ions 5 x Each
Do Now:
9/22
Write the 6 equation for these polyatomic ions:
1. Ammonium
2. Sulfate
3. Nitrate
4. Carbonate
5. Hydroxide
6. Phosphate
HW: Study for Quiz (Ions, Ionic Bonds,
Polyatomic Ions)
Write the equation for these
compounds:
1.
2.
3.
4.
5.
6.
7.
Copper (II)* oxide
Ammonium iodide
Gold (III) Nitrate
Sodium Sulfate
Lead (II)* Hydroxide
Aluminum Carbonate
Iron (III)* Phosphate
Ionic Fit Bonding Puzzle
AFTER YOU FINISH THE PUZZLE, You
must also write a TIEAC paragraph
answering the focus question. Keep in
mind the following points:
◦ Why atoms form ions
◦ Why those ions bond together
◦ What an Ionic Bond is
Polyatomic Compounds Puzzle
 You
& your partners will receive an envelope
with different elements and Polyatomic Ions
manipulatives.
 Put together 5 different compounds for
naming/formula practice. For each compound
you make, you must fill in the information in
the chart in your notes:
Cation
(+ ion)
Ex. Na+
Anion
(- ion)
PO43-
Formula
Name
Na3PO4
Sodium
Phosphate
How To End Class
When I tell you, pack up, pull notes/wst
for homework, put binder on shelf
2. Sit down in your assigned seat.
3. When I tell you, stand up and slide your
chairs in. I will dismiss you (not the
bell).
1.
1. Transition Metals
 Transition
(are weird!)
metals can take on different
charges:
Fe+2
Fe+3
Iron(II) Iron(III)
Naming Transition Metals
 Example:
FeCl2
 Separate the ions and figure out the
anion
Fe
2Cl-
Name: iron (II) chloride
Roman Numerals: I, II, III, IV, V, VI, VII
Practice!
 CuCl2
 FeCl3
 PbO
Writing Formulas from Names
 Example:
Copper (II) oxide
Practice:
Iron (II) bromide
Mercury (I) chloride