| 一 |
yī yǎng huà èr dàn | nitrous oxide N2O / laughing gas |
| 一 |
yī | one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit |
| 氧 |
yǎng | oxygen (chemistry) |
| 氧 |
yǎng huà | to oxidize |
| 化 |
huā | variant of 花 |
| 化 |
huà | to make into / to change into / -ization / to ... -ize / to transform / abbr. for 化学 |
| 二 |
èr | two / 2 / (Beijing dialect) stupid |
| 氮 |
dàn | nitrogen (chemistry) |