| 氢气 | qīng qì | hydrogen (gas) | |
| 氢弹 | qīng dàn | H-bomb; hydrogen bomb | |
| 硫化氢 | liú huà qīng | hydrogen sulfide H2S; sulfureted hydrogen | |
| 氢氧化物 | qīng yǎng huà wù | hydroxide | |
| 氢氧根 | qīng yǎng gēn | hydroxide radical (-OH) |
| 1 | Water contains hydrogen and oxygen. | |
| 2 | Oxygen unites with hydrogen to form water. | |
| 3 | One-ninth of all water on Earth is hydrogen. | |
| 4 | Water can be reduced to oxygen and hydrogen by electrolysis. | |
| 5 | You do not get this line from molecular hydrogen. |