Warm Up: 4 Minutes
Stay in your own seat
You should be working SILENTLY
DO NOT MOVE THE COMPUTERS
1.Log into your computer
2.Go to m.socrative.com
3.Enter room number: 230538
4.Finish all questions
When you are finished, check your grades on PS
Connect
Write the Learning
Target
Hint:
Periodic
Table and
your naming
sheet
Directions
Go to Nearpod.com
Click “JOIN SESSION”
I will give you the code as soon as everyone is
ready
Agenda

Warm Up- 7 Minutes

Cornell Style Notes & Examples- 15 Minutes

Guided Practice-11 Minutes

Independent Practice- 17 Minutes

Closing – 3 Minutes
Goal For Today
Student Given:
Student Answer:
Calcium
Chloride
CaCl2
Chemical Formula
must include:
1. Correct Symbol for Element or Polyatomic
Ion
2. Correct Subscript
CaCl2
Exception: If there is one of an element, then a
subscript is not needed.
HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS?
Calcium Chloride
Example
Step 1
Write the symbol and oxidation number (charge)
for the cation
[oxidation
number to be written as a
superscript]
Ca+2
HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS?
Calcium Chloride
Example
Step 2
Write the symbol and oxidation
number (charge) for the anion
[
oxidation number to be written as a superscript
Cl-1
]
HOW TO WRITE CHEMICAL FORMULAS FOR IONIC COMPOUNDS?
Example
Step 3
Calcium Chloride
Use the criss-cross rule to
write
formula with the correct
subscripts.
Ca+2
Cl-1
CaCl2
How to check your answer?
CaCl
2
Example 1:
Rubidium Sulfate
Example 2:
Chromium (III) Oxide
Example 3:
Magnesium Hydroxide
Example 4:
Strontium Phosphate
Guided Practice

Teacher:
1. Will show the problem on the board

Students:
1.
Take 16 seconds to write the components on
paper, identifying oxidation numbers.
2.
Take 33 seconds to speak with your shoulder
partner to compose the formula for the compound
3.
Be ready to share the name of the compound
when Mr. Ghosh says SWAG
We Do
Beryllium
BeSe
Selenide
We Do
Copper
Cu(NO3)2
(II) Nitrate
We Do
Silver(I)
Ag3P
Phosphide
We Do
Potassium
K2 SO4
Sulfate
Practice Makes Perfect
By completing this worksheet INDEPENDENTLY, it will
help us to perfect the skill of writing chemical
formulas of ionic compounds.
85%
Answer Key










CaBr2
FeO
KI
CoNO3
Fe2S3
CuCl2
Rb2S
BaSO4
KMnO4
Ni(NO3)2










V3(PO4)2
Mn2(Cr2O7)5
Al(SO3)3
PbS2
HgF
RaS
Be3N2
CsCl
Os(HCO3)3
LiOH
Closing
 What
is the process for composing the
chemical formula of an ionic
compound?
Tomorrow we will talk about composing
the chemical formulas of covalent
compounds
Warm Up: 4 Minutes
Stay in your own seat
DO NOT MOVE THE COMPUTERS
Hint: What
rule do we
use for ionic
compounds?
1.Log into your computer
2.Go to m.socrative.com
3.Enter room number: 230538
4.Finish all questions
When you are finished, check your grades on PS
Connect
Warm Up: 4 Minutes
Write the Learning
Target
Stay in your own seat
You should be working SILENTLY
Chemical Name
Chemical Formula
Magnesium Bromide
MgBr2
Chromium(II) Sulfite
CrSO3
Sodium Hydroxide
NaOH
Trioxygen Disulfide
??????
Hint:
Periodic
Table
Directions
Go to Nearpod.com
Click “JOIN SESSION”
I will give you the code as soon as everyone is
ready
Your PIN:
Agenda

Warm Up- 7 Minutes

Cornell Style Notes & Examples- 13 Minutes

Guided Practice- 10 Minutes

Independent Practice- 12 Minutes

Closing – 3 Minutes
HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?
Example
 Step
1
Trioxygen Disulfide
 Make
sure the
name uses
prefixes to ensure
the compound is
covalent.
HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?
Example
 Step
2
Trioxygen Disulfide
 Write
the correct
chemical symbol of
the first element
O
HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?
Example
 Step
3
Trioxygen Disulfide
 Write
the correct
chemical symbol of
the second
element
S
HOW TO WRITE THE CHEMICAL FORMULA OF A COVALENT COMPOUND?
Example
 Step
4
Trioxygen Disulfide
 Use
prefixes to
write the correct
subscripts
O3S2
Example 1
Disulfur Hexafluoride
Example 2
Triphosphorus Tetroxide
Example 3
Sulfur Hexabromide
Guided Practice

Teacher:
1. Will show the problem on the board

Students:
1.
Take 16 seconds to write the components on
paper
2.
Take 33 seconds to speak with your shoulder
partner to compose the formula for the compound
3.
Be ready to share the name of the compound
when Mr. Ghosh says SWAG
We Do
Dinitrogen Tetrahydride
We Do
Trisulfur Octabromide
We Do
Sulfur Dibromide
We Do
Cobalt (II) Chloride
Practice Makes Perfect
By completing this worksheet
INDEPENDENTLY, it will help us to
perfect the skill of writing chemical
formulas of covalent compounds.
85%
Answer Key










LiBr
S3P4
KNO3
OCl
FeI3
CuCl
SF6
Ba(MnO4)2
Ga2(Cr2O7)3
CBr2










V2(CO3)3
Br2F9
C7N10
Na2O
NO
Mn2(Cr2O7)5
XeF2
SO2
Ir(HCO3)7
AsC8
Closing
 What
is the process for composing the
chemical formula of an covalent
compound?
 How
is this different from the formula
of an ionic compound?