气字头, qì zì tóu, Radical of Gas or Air。
它看上去像云气层叠的样子，含有它的汉字一般与气体化学元素有关。另外，还有跟空气有关的抽象词语。
It looks like layers of cloud gas, and the Chinese characters containing it are generally related to gas chemical elements. In addition, there are abstract words related to air.
例词：
氧气, yǎng qì, oxygen,
天气, tiān qì, the weather,
氮气, dàn qì, nitrogen,
气体, qìtǐ, gas,
气氛, qì fēn, atmosphere,
生气, shēng qì, angry
更多含有“气字头”的字：
氕、氖、氘、氚、氙、氛、氟、氢、氨、氦、氩、氧、氤、氪、氮、氰、氲