< p >比较地球的大气成分与我们最近的邻居:< / p > < p > < img src = " https://i.stack.imgur.com/Nvgkw.gif " alt = "在这里输入图像描述" > < / p > < p >如表所示,地球的大气氮浓度是78%,而金星和火星为2.7%到3.8% < a href = " https://www.ucar.edu/learn/1_1_2_1t.htm " rel = " noreferrer " > < / >图像来源。< / p > < p >我读过的问题和答案< a href = " //www.hoelymoley.com/questions/874/why-do-earth-and-venus-have-different-atmospheres " >为什么地球和金星大气层不同?< / >,但答案关注\ ce{二氧化碳}内容美元的行星,这问题是关于$ \ ce {N2} $内容。同时,读过< a href = " //www.hoelymoley.com/q/2173/889 " >为什么有些行星有很多\ ce {N2}和其他人没有美元?< / >,但在这个问题上,我看着氮浓度如何主宰地球大气层中的其他化学物质,不会看行星流程之间的相似之处。< / p >In modern Earth, the nitrogen cycle maintains nitrogen levels, however the early pre-biotic atmosphere, was believed by
most of the scientific community now believes that the early Earth's atmosphere was not reducing. Instead, scientists beleive the atmosphere was full of oxidants, such as $\ce{CO2}$ and $\ce{N2}$.
Source: Duke University Pre-Biotic Earth webpage
What is the origin of the dominant atmospheric nitrogen content in Earth's atmosphere?