| Answer | Crossword Clue |
|---|---|
| ION | Atom with a nonzero valence |
| MONAD | An atom with a valence of one. |
| ION | Atom with a charge |
| ANION | Atom with a negative charge |
| HALIDE | Compound with a halogen atom |
| ENOL | Compound with a doubly linked carbon atom |
| ENOL | Compound with a double-bonded carbon atom |
| ENOL | Compound with a doubly-linked carbon atom |
