Transcript Naming Chemical Compounds

Table of Contents
Lecture/Lab/Activity
22. The Periodic Table
23. Periodic Def & Trends
24. Electron config practice
25. Ions and Oxidation Numbers
26. Lewis Dot Diagram
27. Intro to Chemical Bonding
28. Covalent Bonding
29. Ionic Bonding
30. Ionic vs. Covalent Lab
31. Metallic Bonding
32. Molecular Geometry
33. Writing Chemical Formulas
34. Naming Ionic Compounds
Date
9/24/10
9/27/10
10/4/10
10/5/10
10/6/10
10/7/10
10/12/10
10/14/10
10/18/10
10/19/10
10/21/10
10/25/10
10/26/10
Pg#
47
49
51
53
54
57
61
61
63
61
64
67
69
Objective:
The student will record lecture notes on naming
ionic compounds then practice naming and
formula writing in a class activity.
Agenda:
Naming Ionic compounds– Lecture
Naming Ionic compounds HW
Naming Ionic
Compounds
Ionic and Covalent
Compounds

Binary Compounds


Ionic Compounds





2 elements
a metal and a non-metal
a metal and a polyatomic ion
ammonium ion and a non-metal
ammonium ion and a polyatomic ion
Covalent/Molecular Compounds

Two non-metals
Ionic Formulas

Write each ion, cation first. Don’t show
charges in the final formula.

Overall charge must equal zero.


If charges cancel, just write symbols.
If not, use subscripts to balance charges.

Use parentheses to show more than one
polyatomic ion.

Stock System - Roman numerals indicate the
ion’s charge.
Ionic Naming

Write the names of both ions, cation first.

Change ending of monatomic ions to -ide.

Polyatomic ions have special names.

Stock System - Use Roman numerals to
show the ion’s charge if more than one is
possible. Overall charge must equal zero.

Example: KCl = Potassium chloride
Ionic Naming

Consider the following:

Does it contain a polyatomic ion?



Does it contain a Roman numeral?


-ide, 2 elements  no
-ate, -ite, 3+ elements  yes
Check the table for metals not in Groups 1 or 2.
No prefixes!
Name the following binary
ionic compounds:







MgBr2
NaF
Al2O3
CdO
ZnS
Na2O
K 3N
Some metals have more than one oxidation number
and when you name them you must indicate which of
the oxidation numbers you are using.









There are only 5 elements which you need to memorize which
have more than one oxidation number and they are:
Iron Fe (+3 or +2)
Lead Pb (+4 or +2)
Tin Sn (+4 or +2)
Mercury Hg (+2 or +1)
Copper Cu (+2 or +1)
Nickel Ni ( +2 or +3)
Cobalt Co (+2 or +3)
Chromium Cr (+2 or +3)