-ate Polyatomic Ions: Formulas and Charges
IIIA/13 IVA/14 VA/15 VIA/16 VIIA/17
Borate

BO3Y-
Carbonate

CO3Y-
Nitrate

NO3Y-
Click
on the X
in the Formula
for the #oxygens
Click
on the Y-
in the Formula
for the charge
Polyatomic Ion Charts
from Textbooks

McMurray: Table 3.2
Silverberg: Table 2.5
Corwin: Table 7.03
Tillery: Table 9.3
Kotz: Table 3.1

-ite & -ide Rule
Silicate

SiO3Y-
Phosphate

PO4Y-
Sulfate

SO4Y-
Chlorate

ClO3Y-
Taylor's 3/4
Oxygen Rule   O-All
Border Three Rule:
0 1 2 3 4 5 6 7 8 9
Block of 4/6 Rule:
6-Both   1 2 3 4 5 6   6-All
O-Both   5 6   O-None
Transitional Metal O4 Rule:
0 1 2 3 4 5 6 7 8    T-All
Dot Structures    T-Both
Taylor's
Charge Rule   O-All
Single Bond Rule:
0 1 2 3 4 5 6 7 8 9
Double Bond Rule:
6-All   1 2 3 4 5   6-Both
Hydrogen Rule:
T-Both     1 2 3   O-None
Transitional Metal -2 Rule:
0 1 2 3 4 5 6 7 8   T-All
 Arsenate 

AsO4Y-
Selenate

SeO4Y-
Bromate

BrO3Y-
Chromate

CrO4Y-
Permanganate

MnO4Y-
Per means more charge!
Can you describe
Taylor's 3/4 Oxygen Rule
for -ate Polyatomic Ions
looking at this screen?

Dot Structures
Iodate

IO3Y-