| A | B |
|---|
| Metal + oxygen | Metal oxide |
| Metal + acid | Salt + hydrogen |
| Metal oxide + acid | Salt + water |
| Metal carbonate + acid | Salt + carbon dioxide + water |
| Metal + water | Metal hydroxide (or oxide) + hydrogen |
| Reactive metal + less reactive metal compound | No reaction |
| More reactive metal + less reactive metal compound | More reactive metal compound + less reactive metal displaced |
| Metal hydroxide + acid | Same as Metal oxide + acid |
