| Element or compound |
Valence |
| Aluminum (Al) |
3+ |
| Ammonium (NH4) |
1+ |
| Barium (Ba) |
2+ |
| Boron (B) |
3+ |
| Cadmium (Cd) |
2+ |
| Calcium (Ca) |
2+ |
| Carbonate (CO3) |
2- |
| Chromium (Cr) |
3+, 6+ |
| Copper (Cu) |
2+ |
| Hydrogen (H) |
1+ |
| Hydroxide (OH) |
1- |
| Iron (Fe) |
2+, 3+ |
| Lead (Pb) |
2+ |
| Magnesium (Mg) |
2+ |
| Manganese (Mn) |
2+ |
|
| |
| Element or compound |
Valence |
| Nickel (Ni) |
2+ |
| Oxygen (O) |
2- |
| Nitrogen (N) |
3+, 5+, 3- |
| Nitrate (NO3) |
1- |
| Nitrite (NO2) |
1- |
| Phosphorus (P) |
5+, 3- |
| Phosphate (PO4) |
3- |
| Potassium (K) |
1+ |
| Silver (Ag) |
2+ |
| Silicate (SiO4) |
4+ |
| Sodium (Na) |
1+ |
| Sulfate (SO4) |
2- |
| Sulfide (S) |
2- |
| Zinc (Zn) |
2+ |
|
|
