| Answer | Crossword Clue |
|---|---|
| manganic | Of manganese with a valence of three |
| manganous | Of manganese with a valence of two |
| phosphorous | Of phosphorus with a valence of three |
| bivalence | a. having a valence of two b. having two valences, as aluminum with valences of two and three |
| bivalent | a. having a valence of two b. having two valences, as aluminum with valences of two and three |
| chromic | Of chromium with a higher valence, usually three |
| ferric | ing or containing iron usually with a valence of three |
