1. BrO3- C2O52- BrO2- C2O32- BrO- C2O22- BrO4- C2O42- bromate peroxalate
bromite oxalite
hypobromite hypooxalite
perbromate oxalate
BrO3-
C2O52-
BrO2-
C2O32-
BrO-
C2O22-
BrO4-
C2O42-

2. HBrO3 H2C2O4 H2C2O2 HBrO2 H2C2O3 HBrO HBrO4 H2C2O5 HBr
bromic acid oxalic acid
bromous acid hypooxalous acid
hypobromous acid oxalous acid
perbromic acid peroxalic acid
hydrobromic acid
HBrO3
H2C2O4
H2C2O2
HBrO2
H2C2O3
HBrO
HBrO4
H2C2O5
HBr

3. FO2- BO3- FO- BO23- HF H3BO3 HFO4 H3BO2 HFO3 H3BO4 HFO2 H3BO HFO H3B
fluorate
FO BO33-
FO BO43-
borate
perfluorate
perborate
FO BO3-
FO BO23-
HF H3BO3
HFO H3BO2
HFO H3BO4
HFO H3BO
HFO H3B
fluorite
hypoborite
borite
hypofluorite
hydrofluoric acid
boric acid
perfluoric acid
borous acid
fluoric acid
perboric acid
fluorous acid
hypoborous acid
hypofluorous acid
hydroboric acid

4. H = 0 Na = 0 Cl = 0 Fe = +2 Zn = +2 Br = -1 Na = +1 F = -1 Cl= +3
hydrogen gas
H = 0
elemental
sodium metal
Na = 0
elemental
chlorine gas
Cl = 0
elemental
iron (II) ion
Fe = +2
ionic charge
zinc ion
Zn = +2
ionic charge
bromide
Br = -1
ionic charge
sodium fluoride
Na = +1
F = -1
ionic charges
chlorine trifluoride
Cl= +3
F = -1
fluorine is always -1 except when its not
(elemental)
Thus, chlorine is +3

5. Na = +1 Cl = -1 K = +1 Cl = -1 Mg = +2 Cl = -1 Ca = +2 O = -2 S = +6
sodium chloride
Na = +1
Cl = -1
ionic charges
K = +1
Cl = -1
potassium chloride
ionic charges
magnesium chloride
Mg = +2
Cl = -1
ionic charges
calcium sulfate
ionic charges
Ca = +2
oxygen is always except when its not
O = -2
S = +6
SO42-
(elemental, peroxide, superoxide, or when bonded to fluorine ) +6
+ 4(-2) = -2

6. B = +3 Cl = -1 Na = +1 I = -1 H = +1 O = -2 H = +1 O = -1 ionic charge
boron trichloride
ionic charge
thus, boron is +3
sodium iodide
Na = +1
I = -1
ionic charges
dihydrogen monoxide
H = +1
O = -2
oxygen is always -2 except when its not
(elemental, peroxide, superoxide, or when bonded to fluorine)
thus, hydrogen is +1
hydrogen peroxide
H = +1
O = -1
oxygen is always except when its not
thus, hydrogen is +1
(elemental, peroxide, superoxide, or when bonded to fluorine)

7. K = +1 O = -½ O = +5 F = -1 oxygen is always -2 except when its not
potassium superoxide
K = +1
O = -½
oxygen is always -2 except when its not
(elemental, peroxide, superoxide, or when bonded to fluorine)
oxygen pentafluoride
O = +5
F = -1
fluorine is always except when its not
thus, oxygen is +5
(elemental, peroxide, superoxide, or when bonded to fluorine)

8. Na = +1 H = -1 H = +1 Cl = -1 ionic charges ionic charges
sodium hydride
Na = +1
H = -1
ionic charges
hydrochloric acid
H = +1
Cl = -1
ionic charges