1. Writing Names and Formulas for Compounds

2. Naming A-metal compounds
Rules for naming A-metal compounds:
Ex. LiF
1) Write the name of the metal (lithium)
2) write the name of the non-metal, changing the ending to –ide (fluoride)
The name would be lithium fluoride

3. A-metal practice MgCl2 NaBr AlN K3N Ca3P2 magnesium chloride
sodium bromide
aluminum nitride
potassium nitride
calcium phosphide

4. All non-metals and their proper -ide ending
nitride
oxide
fluoride
phosphide
sulfide
chloride
arsenide
selenide
bromide
telluride
iodide
astatide

5. Writing formulas for A-metal compounds
Ex. magnesium fluoride
( teacher will review Lewis formula way first)
Oxidation number = the charge on an ion
Steps
Write the symbol for the metal (Mg)
Determine the ox. Number/charge on it (+2)- so overall you will write- Mg+2
Do the same for the non-metal ion
(F-1)

6. Writing formulas for A-metal compounds continued
So far we have Mg+2 and F-1
Remember that all ionic compounds are
overall. + and - = zero overall
Neutral
4) The final step is to add enough ions of each to make the compound neutral overall.
Would a compound containing one magnesium ion (with a +2 charge) and one fluoride ion (with a –1) charge be neutral overall?
NO! overall would be +1, not neutral.

7. Writing formulas for A-metal compounds continued
Mg+2 and F this is where we left off
How many fluoride ions would the formula need to be neutral overall?
TWO!
Thus the formula should be…
MgF Mg+2 F-1 F-1 = 0

8. Writing formulas for A-metal Let’s Try Another
Ex. aluminum bromide
Write the symbols:
Al Br
Determine the charges:
Al+3 Br -1
Add enough of both ions to make it neutral
What will the formula be?
AlBr3

9. Writing formulas for A-metal Let’s Try Another
Ex. lithium oxide
Write the symbols:
Li O
Determine the charges:
Li+1 O-2
What will the formula be?
Li2O

10. Shortcut
SOXS
Symbols
Oxidation #
Criss-cross
Simplify!

11. Practice writing formula of A-metal compounds
Try these on your own
calcium oxide
calcium fluoride
sodium nitride

12. Practice answers Ex. calcium oxide Symbols with charges: Ca+2 O-2 CaO
What will the formula be?
CaO

13. Practice answers Ex. calcium fluoride Symbols with charges: Ca+2 F-1
What will the formula be?
CaF2

14. Practice answers Ex. sodium nitride Symbols with charges: Na+1 N-3
What will the formula be?
Na3N

15. Try this one- it’s tougher
Ex. aluminum oxide
Symbols with charges:
Al+3 O-2
What will the formula be? Hint: more than one of each is needed. Try having two of the odd charged ion. (Al is the odd charge)
Al+3 Al+3= +6 charge total: -6 is now needed
O-2 O-2 O-2 = -6 charge =0
Thus the formula is
Al2O3

16. Another tough one.. Thus the formula is Mg3P2 Ex. Magnesium phosphide
Symbols with charges:
Mg+2 P-3
What will the formula be? Try starting with two of the odd charge.
P-3 P = -6
Mg+2 Mg+2 Mg+2 = +6
Thus the formula is
Mg3P2

17. Let’s finish up A-metals…
Try these tough ones on your own
beryllium nitride
aluminum sulfide
strontium arsenide

18. Practice answers Ex. beryllium nitride Symbols with charges: Be+2 N-3
What will the formula be?

19. Practice answers Ex. aluminum sulfide Symbols with charges: Al+3 S-2
What will the formula be?

20. Practice answers Ex. strontium arsenide Symbols with charges:
Sr+2 As-3
What will the formula be?
Sr3As2

21. Naming Compounds when given the formula
Jump to T-metals
Activity
Go forward to T-metal before this activity

22. Writing Formulas activity
Yellow - Blue - White cards

23. Formulas Neutral!!!!!! Throughout this activity you must remember this
Remember, all ionic compounds are neutral overall.
Neutral!!!!!!
Throughout this activity you must remember this

24. Writing Formulas: A-metals
Lithium Fluoride
Sodium chloride
Magnesium oxide
Calcium Fluoride
Magnesium chloride
Aluminum fluoride
Lithium nitride

25. Strontium sulfide
francium telluride
Aluminum iodide
Beryllium phosphide
Cesium nitride
Potassium iodide
Sodium selenide

26. Writing formulas for T-metal compounds
Ex. Iron III oxide
Rules
(Roman numeral indicates the charge!)
Write the symbols for both elements
Write the charges for both elements
Determine how many of each is needed for the compound to be neutral.
A) try having two of the odd charge
Fe O
Fe+3 O-2
Fe +3 Fe+3 = +6; so –6 is needed
Fe2O3
Formula?
O-2, 0-2, O-2 = -6

27. Practice Writing formulas for T-metals
Titanium II oxide
Write symbols with charges:
Ti+2 O-2
Determine formula:
TiO
Cobalt IV oxide:
Symbols/charges:
Co +4 O -2
CoO2
Formula?

28. Writing Formulas- T-metals
Copper I chloride
Copper II chloride
Titanium II fluoride
Titanium IV Fluoride
Iron II oxide
Iron III nitride
Copper I Sulfide

29. Writing Formulas- tougher ones
Calcium phosphide
Magnesium nitride
Aluminum sulfide
Iron III oxide (rust)
Titanium II oxide
Titanium IV sulfide
Titanium IV phosphide

30. Writing Names Activity
Pink-Green- White cards

31. Writing names: A-metals
LiF
lithium fluoride
Na2S
LiCl
CaO
Al2S3
Mg3P2

32. Naming T-metal compounds
Ex. TiO2
Note: All names will contain a roman numeral
The Roman numeral will be the charge on each T-metal (see middle of PC)
The charge will always be positive
**The key is to determine the charge on the T-metals**.

33. Naming T-metal compounds
Ex. TiO2
Rules for naming T-metals
1) Write the formula for the compound
Ti O2
2) Write the charge of the non-metal
Ti O2-2
3) Determine the charge on the T-metal…
a) first determine the total negative charge
O-2 O-2 = -4 total
so +4 total needed to be neutral
b) Determine what the charge of each metal
must be to make it neutral.
TiO2- this formula only has 1 Ti and 2 oxygens
O-2 O-2 = -4 / Ti+? = 0
Ti+4

34. Naming T-metal compounds
So far we have…
Ti+4 O2-2
The roman numeral in the name of this compound is determined by the on the T-metal.
charge
Thus the name will be…
Titanium oxide IV
Remember, the + charge = the Roman numeral

35. Let’s do another +6 needed -6 total Ex. Ni2S3
Write formula – show the non-metal’s charge:
Ni2 S3-2
Find the total negative (-) charge:
Find the charge on each (+) ion
Two Ni S
Ni+? Ni+? +3
S -2
S –2
THE FASTER WAY
-6 total
+6 total +?
+6 needed
Ni2 S3-2
Name?
Nickel sulfide
+3 on each Ni
-6 total
III
Name?
Nickel sulfide
III

36. Here’s another… +14 needed -14 total Ex. Cr2O7
Write formula with non-metal’s charge:
Cr2O7-2
Find the total negative (-) charge:
O -2 O -2
O -2 O –2
O –2 O –2
O –2
Find the charge on each (+) ion
Cr+? Cr+? +7
THE FASTER WAY
+14
-14 +?
+14 needed
Cr2 O7-2
-14 total
Name?
chromium oxide
+7 on each Cr
VII
Name?
chromium oxide
VII

37. Here’s another… -2 total +2 needed Ex. Au2S
Write formula with non-metal’s charge:
Au2S-2
Find the total negative (-) charge:
Find the charge on each (+) ion
Au+? Au+? +1
THE FASTER WAY
S -2 +2 -2 +?
-2 total
+2 needed
Au2 S-2
Name?
gold sulfide
+1 on each Au I
Name?
gold sulfide I

38. Here’s another… fast way only
Ex. Fe2O3
Write formula with non-metal’s charge:
Fe2O3-2
Find the total negative (-) charge:
Find the charge on each (+) ion +6 -6 +?
Fe2 O3-2
+3 on each Fe
Name?
iron oxide
III

39. Here’s another… fast way only
Ex. CrN2
Write formula with non-metal’s charge:
CrN2-3 +6 -6 +?
CrN2-3
+6 on each Cr
Name?
chromium nitride VI

40. Here’s another… fast way only
Ex. Fe2O3
Fe2O3-2
Find the total negative (-) charge:
Find the charge on each (+) ion +6 -6 +?
Fe2 O3-2
Jump to activity
Writing NAMES
+3 on each Fe
Name?
iron sulfide
III

41. Writing names T-metals
FeO
NiCl2
TiO2
Cu2O3
CrF2
CoS2

42. Writing names: mixed metals
AlCl3
CoN
Fe2O3
Ca3P2
NiO
Cr2O5

43. Naming formulas mixed metals
Cu2O
K3P
CrN2
MgF2
NiP
Ti2S

44. Activity last page: Naming formulas mixed-metals
TiS2
K2S
FeN3
Cr2O7
Al2O3

45. Names/ formulas mini-quiz A and T metals
1) calcium oxide
2) iron III chloride
3) aluminum oxide
4) nickel I sulfide
5) lithium nitride
6) MgCl2
7) Cu3N
8) K3P
9) FeO
10) TiO2
CaO
FeCl3
Al2O3
Ni2S
Li3N
magnesium chloride
copper I nitride
potassium phosphide
iron II oxide
titanium IV oxide

46. Naming Covalent compounds
Covalent compounds contain non-metals only
Use prefixes to state how many atoms of each element there are
Remember, there are no charges in covalent compounds (electrons are shared).

47. Naming Covalent compounds
Here are the prefixes 1 2 3 4 5 6 7 8 9 10
mono di
tri
tetr(a)
pent(a)
hex(a)
hept(a)
oct(a)
non(a)
dec(a)

48. Naming Covalent compounds1 2 3 4 5 6 7 8 9 10
mono di
tri
tetr(a)
pent(a)
hex(a)
hept(a)
oct(a)
non(a)
dec(a)
Rules for naming:
Be sure the compound only has non- metals before using prefixes
Use prefixes* to state how many atoms there are of each element
* never start a name with “mono”
Ex. CO2
1 carbon/ 2 oxygens
*carbon dioxide

49. Naming Covalent compounds1 2 3 4 5 6 7 8 9 10
mono di
tri
tetr(a)
pent(a)
hex(a)
hept(a)
oct(a)
non(a)
dec(a)
N20
dinitrogen monoxide CO
carbon monoxide
OF2
oxygen difluoride
CF4
carbon tetrafluoride

50. Naming Covalent compounds1 2 3 4 5 6 7 8 9 10
mono di
tri
tetr(a)
pent(a)
hex(a)
hept(a)
oct(a)
non(a)
dec(a)
If the letter “a” and “o” are side by side (ao), drop the “a”
Example:
N2O5
dinitrogen pentaoxide becomes…
dinitrogen pentoxide: (drop the a)
P4O10
tetraphosphorus decaoxide
tetraphosphorus decoxide

51. Writing formulas for covalent compounds1 2 3 4 5 6 7 8 9 10
mono di
tri
tetr(a)
pent(a)
hex(a)
hept(a)
oct(a)
non(a)
dec(a)
Easy!!!!!
DO NOT try to use charges to figure it out.
The prefixes will indicate how many of each element you need.
Ex. diphosphorus monoxide
P2O
nitrogen trifluoride
NF3
dicarbon tetrachloride
C2Cl4

52. Answer to quiz
TiCl2
H2O
SrCl2
SiO2
CuS2
Br7O9
CrSe3
Al2O3
CaI2
FeN

53. THE WONDERFULLY AWFUL POLYATOMIC ions
Here are some common polyatomic molecules we will use:
Note that each has a charge on it overall.
Each one is made of more than one atom.

54. THE WONDERFULLY AWEFUL POLYATOMIC ions
NH ammonium
C2H3O acetate
ClO chlorate
OH hydroxide
NO nitrate
CO carbonate
CrO4 -2 chromate
SO sulfate
PO phosphate

55. THE WONDERFULLY AWEFUL POLYATOMICS
NH ammonium
C2H3O2-1 acetate
ClO chlorate
OH hydroxide
NO nitrate
CO3-2 carbonate
CrO4-2 chromate
SO sulfate
PO phosphate
Although polyatomics are large and look strange- they are not difficult.
Use the same rules that you always have. No extra learning is required.
Treat them like one big single element.

56. Naming compounds with polyatomics…
There are no new rules!
If you have more than one polyatomic, simply use parentheses. Ex (ClO3-1)2: this is how to show two chlorates.
Mg(ClO3)2- name this compound.
Mg is an A-metal: use A-metal rules.
Magnesium chlorate

57. Naming compounds with polyatomics…
Cr(SO4)2 name this compound.
Cr is a T-metal: use T-metal rules.
Chromium IV sulfate
(NH4)3P
Ammonium phosphide
Ammonium is always +1
Treat it like an A metal
Cu(NO3)2
Copper II nitrate

58. Writing Formulas with polyatomics…
No new rules!
Just be sure it is neutral overall
Ex. Potassium sulfate
Potassium is an A-metal…
K2SO4
Calcium nitrate…
Ca(NO3)2

59. Writing Formulas with polyatomics…
Titanium IV carbonate- write the formula
Ti(CO3)2
Iron VI phosphate
Fe(PO4)2
Gold I chromate
Au2CrO4
**Nickel II hydroxide
Ni(OH)2

60. Practice mini quiz Name the following 1) MgClO3 2) Co3(PO4)2 3) K2SO4
4) Cu(C2H3O2)3
Write the formulas
5) Lithium phosphate
6) Iron II carbonate
7) Aluminum chromate
8) Titanium IV sulfate
9) Titanium IV sulfide

61. Practice mini quiz Name the following 1) MgClO3 2) Co3(PO4)2 3) K2SO4
4) Cu(C2H3O2)3
Answers
1) Magnesium chlorate
2) Cobalt II phosphate
3) Potassium sulfate
4) Copper III acetate

62. Practice mini quiz answers 5) Li3PO4 6) FeCO3 7) Al2(CrO4)3
Write the formulas
5) Lithium phosphate
6) Iron II carbonate
7) Aluminum chromate
8) Titanium IV sulfate
9) Titanium IV sulfide
answers
5) Li3PO4
6) FeCO3
7) Al2(CrO4)3
8) Ti(SO4)2
9) TiS2

63. Bell work: Date:
Review for 3 min.

64. Mini quiz- Polyatomic Compounds
Box final answers.
Name the following
1) K2CrO4
2) Fe(PO4)2
3) Al2(SO4)3
4) Cu2CO3
Write the formulas
5) sodium phosphate
6) Titanium II carbonate
7) Magnesium acetate
8) copper IV sulfate

65. Bell work: Date: Box final answer. Name the following [1) HF 2) HClO3
3) HI
4) H3PO4
Write the formulas
5) Hydroselenic acid
6) Nitric acid
7) Hydrosulfuric acid
8) Chromic acid

66. Practice Quiz: Date: 9/29/14
Name the following
[1) K2CrO4
2) Fe(PO4)2
3) Al2(SO4)3
4) Cu2CO3
5) H3PO4
Write the formulas
6) sodium phosphate
7) Titanium II carbonate
8) Magnesium acetate
9) copper IV sulfate
10) Hydrosulfuric acid

67. Acids- mini quiz Box final answer. Name the following 1) H2CrO4 2) HCl
3) H3PO4
4) H2S
Write the formulas
5) Hydroiodic acid
6) Nitric acid
7) Hydrosulfuric acid
8) Carbonic acid

68. Acids- mini quiz II Name the following 1) H2S 2) H2CO3 3) HNO3 4) HBr
5) H3PO4
Write the formulas
6) Hydroiodic acid
7) acetic acid
8) phosphoric acid
9) hydrochloric acid
10) Nitric acid

69. All Compounds- warm up! Name the following 1) CaCl2 2) H2CO3 3) FeS2
4) Br2P3
Write the formulas
5) sulfuric acid
6) nickel I oxide
7) carbon tetrafluoride
8) aluminum oxide

70. All Compounds Quiz Name the following 1) CuS2 2) HClO3 3) Ni3P 4) CO2
Write the formulas
5) sulfuric acid
6) nickel IV sulfate
7) dicarbon trifluoride
8) aluminum chromate