FORMULAS to NAMES IONIC and MOLECULAR
FORMULAS to NAMES IONIC and MOLECULAR
Here are 50 chances for you to look at a formula and determine the
proper or stock name of the compound.
You should first decide if it’s IONIC or MOLECULAR.
You can tell if the 1st atom or part is a METAL, it’s ionic.
If the 1st atom is a NONMETAL, then it’s is molecular.
The only exception is AMMONIUM, which is NH
4
+1
Ammonium is a polyatomic cation, it is ionic.
Grade yourself harshly: it’s right or it’s wrong.
Almost right is all wrong.
Fix your errors, you are making yourself a key - for home practice.
Do this again before Thursday!
Learn the rules for naming compounds (one page in the BASICS).
MgO
What is the name of this compound?
1
MgO
Magnesium Oxide
Mg is a metal, this is ionic
Mg
+2
O
-2
2:2 ratio becomes 1:1
1
TaF
5
What is the name of this compound?
2
TaF
5
Tantalum fluoride
(no RN, only 1 kind of cation)
Ta is a metal, this is ionic
Ta
+5
F
-1
1:5 ratio
2
SrCl
2
What is the name of this compound?
3
SrCl
2
Strontium chloride
Sr is a metal, this is ionic
Sr
+2
Cl
-1
1:2 ratio
3
NiBr
3
What is the name of this compound?
4
NiBr
3
Nickel III Bromide
Ni is a transitional metal, this is ionic
Ni
+3
Cl
-1
1:3 ratio
4
NF
3
What is the name of this compound?
5
NF
3
Nitrogen trifluoride
N is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
5
TiO
2
What is the name of this compound?
6
TiO
2
Titanium IV oxide
Ti is a transitional metal, this is ionic
Ti
+4
O
-2
The 2:4 ratio → 1:2
6
NO
2
What is the name of this compound?
7
NO
2
Nitrogen dioxide
N is a nonmetal, this is molecular
Use the prefix naming system
1:2 ratio
7
Ti
2
O
3
What is the name of this compound?
8
Ti
2
O
3
Titanium III oxide
Ti is a transitional metal, this is ionic
Ti
+3
O
-2
2:3 ratio
8
TiO
What is the name of this compound?
9
TiO
Titanium II oxide
Ti is a transitional metal, this is ionic
Ti
+2
O
-2
1:1 ratio
9
AlN
What is the name of this compound?
10
AlN
Aluminum nitride
Al is a metal, this is ionic
Al
+3
N
-3
The 3:3 ratio → 1:1 ratio
10
PCl
3
What is the name of this compound?
11
PCl
3
Phosphorous trichloride
P is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
11
BF
3
What is the name of this compound?
12
BF
3
Boron trifluoride
(rhymes with…)
B is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
12
CF
4
What is the name of this compound?
CF
4
Carbon tetrafluoride
C is a nonmetal, this is molecular
Use the prefix naming system
1:4 ratio
N
2
O
3
What is the name of this compound?
14
N
2
O
3
Dinitrogen trioxide
N is a nonmetal, this is molecular
Use the prefix naming system
2:3 ratio
14
OF
2
What is the name of this compound?
15
OF
2
Oxygen difluoride
O is a nonmetal, this is molecular
Use the prefix naming system
1:2 ratio
15
SO
3
What is the name of this compound?
16
SO
3
Sulfur trioxide
S is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
16
SiO
2
What is the name of this compound?
17
SiO
2
Silicon dioxide
Si is a nonmetal, this is molecular
Use the prefix naming system
1:2 ratio
17
SiF
4
What is the name of this compound?
18
SiF
4
Silicon tetrafluoride
Si is a nonmetal, this is molecular
Use the prefix naming system
1:4 ratio
18
H
2
S
What is the name of this compound?
19
H
2
S
Dihydrogen monosulfide
(this is stinky gas!)
H is a nonmetal, this is molecular
Use the prefix naming system
2:1 ratio
19
AsBr
5
What is the name of this compound?
20
AsBr
5
Arsenic pentabromide
As is a nonmetal, this is molecular
Use the prefix naming system
1:5 ratio
20
SeO
3
What is the name of this compound?
21
SeO
3
Selenium trioxide
Se is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
21
PI
3
What is the name of this compound?
22
PI
3
Phosphorous triiodide
P is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
22
FCl
What is the name of this compound?
23
FCl
Fluorine monochloride
F is a nonmetal, this is molecular
Use the prefix naming system
1:1 ratio
23
HBr
What is the name of this compound?
24
HBr
Hydrogen monobromide
H is a nonmetal, this is molecular
Use the prefix naming system
1:1 ratio
24
SBr
6
What is the name of this compound?
25
SBr
6
Sulfur hexabromide
S is a nonmetal, this is molecular
Use the prefix naming system
1:6 ratio
25
PCl
5
What is the name of this compound?
26
PCl
5
Phosphorous pentachloride
P is a nonmetal, this is molecular
Use the prefix naming system
1:5 ratio
26
V
2
O
3
What is the name of this compound?
27
V
2
O
3
Vanadium III oxide
V is a transitional metal, this is ionic
V
+3
O
-2
2:3 ratio
27
Cr
2
(SO
4
)
3
What is the name of this compound?
28
Cr
2
(SO
4
)
3
Chromium III sulfate
Cr is a transitional metal, this is ionic
Cr
+3
SO
4
-2
2:3 ratio
28
AsI
3
What is the name of this compound?
29
AsI
3
Arsenic triiodide
As is a nonmetal, this is molecular
Use the prefix naming system
1:3 ratio
29
Ta(OH)
5
What is the name of this compound?
30
Ta(OH)
5
Tantalum hydroxide
(no RN needed)
Ta is a transitional metal, this is ionic
Ta
+5
OH
-1
1:5 ratio
30
IrCl
3
What is the name of this compound?
31
IrCl
3
Iridium (III) chloride
Ir is a transitional metal, this is ionic
Ir
+3
Cl
-1
1:3 ratio
31
CSe
2
What is the name of this compound?
32
CSe
2
Carbon diselenide
C is a nonmetal, this is molecular
Use the prefix naming system
1:2 ratio
32
Ir
3
(PO
4
)
4
What is the name of this compound?
33
Ir
3
(PO
4
)
4
Iridium (IV) phosphate
Ir is a transitional metal, this is ionic
Ir
+4
PO
4
-3
3:4 ratio
33
ZnO
What is the name of this compound?
34
ZnO
Zinc oxide
(no RN needed)
Zn is a transitional metal, this is an ionic compound
Zn
+2
O
-2
1:1 ratio
34
CuO
What is the name of this compound?
35
CuO
Copper II oxide
Cu is a transitional metal, this is ionic
Cu
+2
O
-2
1:1 ratio
35
Cu
2
O
What is the name of this compound?
36
Cu
2
O
Copper I oxide
Cu is a transitional metal, this is ionic
Cu
+1
O
-2
2:1 ratio
36
CuS
What is the name of this compound?
37
CuS
Copper II sulfide
Cu is a transitional metal, this is ionic
Cu
+2
S
-2
The 2:2 ratio becomes a 1:1 ratio
37
ZrS
2
What is the name of this compound?
38
ZrS
2
Zirconium sulfide
(no RN needed)
Zr is a transitional metal, this is ionic
Zr
+4
S
-2
The 2:4 ratio becomes a 1:2 ratio
38
ZnS
What is the name of this compound?
39
ZnS
Zinc sulfide
(no RN needed)
Zn is a transitional metal, this is ionic
Zn
+2
S
-2
1:1 ratio
39
Ca(OH)
2
What is the name of this compound?
40
Ca(OH)
2
Calcium hydroxide
Ca is a metal, this is ionic
Ca
+2
OH
-1
1:2 ratio
40
Mg
3
N
2
What is the name of this compound?
41
Mg
3
N
2
Magnesium nitride
Mg is a metal, this is ionic
Mg
+2
N
-3
3:2 ratio
41
SrF
2
What is the name of this compound?
42
SrF
2
Strontium fluoride
Sr is a metal, this is ionic
Sr
+2
F
-1
1:2 ratio
42
Rb
3
P
What is the name of this compound?
43
Rb
3
P
Rubidium phosphide
Rb is a metal, this is ionic
Rb
+1
P
-3
3:1 ratio
43
Rb
3
PO
4
What is the name of this compound?
44
Rb
3
PO
4
Rubidium phosphate
Rb is a metal, this is ionic
Rb
+1
PO
4
-3
3:1 ratio
44
(NH
4
)
3
PO
4
What is the name of this compound?
45
(NH
4
)
3
PO
4
Ammonium phosphate
NH
4
+1
makes a cation, this is ionic
NH
4
+1
PO
4
-3
3:1 ratio
45
NH
4
I
What is the name of this compound?
46
NH
4
I
Ammonium iodide
NH
4
+1
makes a cation, this is ionic
NH
4
+1
I
-1
1:1 ratio
46
AgNO
3
What is the name of this compound?
47
AgNO
3
Silver nitrate
(no RN needed)
Ag
+1
is a metal, this is ionic
Ag
+1
I
-1
1:1 ratio
47
AgNO
2
What is the name of this compound?
48
AgNO
2
Silver nitrite
(no RN needed)
Ag
+1
is a metal, this is ionic
Ag
+1
I
-1
1:1 ratio
48
Bi(NO
2
)
5
What is the name of this compound?
49
Bi(NO
2
)
5
Bismuth (V) nitrite
Bi is a transitional metal, this is ionic
Bi
+5
NO
2
-1
1:5 ratio
49
Bi(SCN)
3
What is the name of this compound?
50
Bi(SCN)
3
Bismuth (III) thiocyanate
Bi is a transitional metal, this is ionic
Bi
+3
SCN
-1
1:3 ratio
50
Test your knowledge of naming ionic and molecular compounds with 50 chances to practice matching formulas to proper or stock names. Challenge yourself to accurately identify whether the compound is ionic or molecular based on the elements involved. Learn the rules for naming compounds and improve your skills before the next assessment.
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Presentation Transcript
FORMULAS to NAMES IONIC and MOLECULAR Here are 50 chances for you to look at a formula and determine the proper or stock name of the compound. You should first decide if it s IONIC or MOLECULAR. You can tell if the 1st atom or part is a METAL, it s ionic. If the 1st atom is a NONMETAL, then it s is molecular. The only exception is AMMONIUM, which is NH4+1 Ammonium is a polyatomic cation, it is ionic.
Grade yourself harshly: its right or its wrong. Almost right is all wrong. Fix your errors, you are making yourself a key - for home practice. Do this again before Thursday! Learn the rules for naming compounds (one page in the BASICS).
1 MgO What is the name of this compound?
1 MgO Magnesium Oxide Mg is a metal, this is ionic Mg+2 O-2 2:2 ratio becomes 1:1
2 TaF5 What is the name of this compound?
2 TaF5 Tantalum fluoride (no RN, only 1 kind of cation) Ta is a metal, this is ionic Ta+5 F-1 1:5 ratio
3 SrCl2 What is the name of this compound?
3 SrCl2 Strontium chloride Sr is a metal, this is ionic Sr+2 Cl-1 1:2 ratio
4 NiBr3 What is the name of this compound?
4 NiBr3 Nickel III Bromide Ni is a transitional metal, this is ionic Ni+3 Cl-1 1:3 ratio
5 NF3 What is the name of this compound?
5 NF3 Nitrogen trifluoride N is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
6 TiO2 What is the name of this compound?
6 TiO2 Titanium IV oxide Ti is a transitional metal, this is ionic Ti+4 O-2 The 2:4 ratio 1:2
7 NO2 What is the name of this compound?
7 NO2 Nitrogen dioxide N is a nonmetal, this is molecular Use the prefix naming system 1:2 ratio
8 Ti2O3 What is the name of this compound?
8 Ti2O3 Titanium III oxide Ti is a transitional metal, this is ionic Ti+3 O-2 2:3 ratio
9 TiO What is the name of this compound?
9 TiO Titanium II oxide Ti is a transitional metal, this is ionic Ti+2 O-2 1:1 ratio
10 AlN What is the name of this compound?
10 AlN Aluminum nitride Al is a metal, this is ionic Al+3 N-3 The 3:3 ratio 1:1 ratio
11 PCl3 What is the name of this compound?
11 PCl3 Phosphorous trichloride P is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
12 BF3 What is the name of this compound?
12 BF3 Boron trifluoride (rhymes with ) B is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
CF4 Carbon tetrafluoride C is a nonmetal, this is molecular Use the prefix naming system 1:4 ratio
14 N2O3 What is the name of this compound?
14 N2O3 Dinitrogen trioxide N is a nonmetal, this is molecular Use the prefix naming system 2:3 ratio
15 OF2 What is the name of this compound?
15 OF2 Oxygen difluoride O is a nonmetal, this is molecular Use the prefix naming system 1:2 ratio
16 SO3 What is the name of this compound?
16 SO3 Sulfur trioxide S is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
17 SiO2 What is the name of this compound?
17 SiO2 Silicon dioxide Si is a nonmetal, this is molecular Use the prefix naming system 1:2 ratio
18 SiF4 What is the name of this compound?
18 SiF4 Silicon tetrafluoride Si is a nonmetal, this is molecular Use the prefix naming system 1:4 ratio
19 H2S What is the name of this compound?
19 H2S Dihydrogen monosulfide (this is stinky gas!) H is a nonmetal, this is molecular Use the prefix naming system 2:1 ratio
20 AsBr5 What is the name of this compound?
20 AsBr5 Arsenic pentabromide As is a nonmetal, this is molecular Use the prefix naming system 1:5 ratio
21 SeO3 What is the name of this compound?
21 SeO3 Selenium trioxide Se is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
22 PI3 What is the name of this compound?
22 PI3 Phosphorous triiodide P is a nonmetal, this is molecular Use the prefix naming system 1:3 ratio
23 FCl What is the name of this compound?
23 FCl Fluorine monochloride F is a nonmetal, this is molecular Use the prefix naming system 1:1 ratio
24 HBr What is the name of this compound?
24 HBr Hydrogen monobromide H is a nonmetal, this is molecular Use the prefix naming system 1:1 ratio
