Unit 2 Chemical Bonding: Covalent

1
Unit 2 Chemical Bonding Covalent

• 2.3 What is in a name of a covalent compound?

AIM How do we name covalent compounds?
DO NOW
Write the chemical formula for the following
compound COPPER SULFATE
1. What are the ions that bond?
Cu1
SO42
Cu2SO4
2. What is the chemical formula?
3. Are the electrons shared or transferred when
the atoms bond?
Since copper is a metal and sulfate is a
polyatomic ion, an ionic bond has been formed so
the electrons were TRANSFERRED
2
REVIEW
DIRECTIONS Look at your notes from 1.6. How do
we name Ionic Compounds?
STEPS DESCRIPTION EXAMPLE NaCl
IDENTIFY THE ATOMS USED
IONS FORMED
ADD THE -IDE
Find the names of the atoms used on the Periodic
Table
Na? Sodium

Cl? Chlorine
Na? Cation
CATION is first ANION is second
Cl-? Anion
CATION? name stays the same ANION? ending changes
to -ide
Chloride
Sodium
3
NAME COVALENT COMPOUNDS
STEPS DESCRIPTION
1
2
3
Write full name of the first nonmetal
Shorten then name of the second nonmetal and add
-ide
Add a Greek Prefix to each of the elements if
needed
The prefix mon- is not used if there is only one
atom of the first element..
4
GREEK PREFIXES
Number of atoms Greek Prefix
1 mon-
2 di-
3 tri-
4 tetra-
5 penta-
6 hexa-
7 hepta-
8 octa-
9 Nona-
10 Deca
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LETS TRY SOME

• CO2

First Nonmetal
Second Nonmetal
Name
CARBON DIOXIDE
OXYGEN
CARBON
Shortened version OX-
OXIDE
How many do we have?
2
So it must be
DIOXIDE
6
LETS TRY SOME

• Cl2O3

First Nonmetal
Second Nonmetal
Name
CHLORINE TRIOXIDE
oxygen
Chlorine
Shortened version OX-
OXIDE
How many do we have?
3
So it must be
TRIOXIDE
7
LETS TRY SOME

• SiF4

First Nonmetal
Second Nonmetal
Name
SILICON TETRAFLUORIDE
Fluorine
Silicon
Shortened version Fluor-
FLUORIDE
How many do we have?
4
So it must be
TETRAFLUORIDE
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NEXT STEPS

• Complete the INDEPENDENT PRACTICE
• When you are done you may do the following
• Finish working on Lab 1 or Lab 2
• Extra Credit
• Vocabulary Words