Why we have no light gases like Helium and Hydrogen in the atmosphere?

来源：百度知道编辑：UC知道时间：2024/05/30 19:02:49

拜托大家帮个忙～答案最好用英文回答，不过如果真的不行的话可以用中文回答。感激不尽!!!><

oh, we have such both gases in the atmosphere, but only quite a little bit of them.

空气是一种多组分混合气体，其主要组分是氧、氮、氩、二氧化碳，还有微量的稀有气体（氖、氦、氪、氙）、甲烷及其它碳氢化合物、氢、臭氧等。

氦气为无色无味，不可燃气体，空气中的含量约为百万分之5.2
空气中氢气含量应少于1%（体积比）

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