[chem] hydrogen 係咪冇neutron?

Hydrogen≠no neutrons

You need to observe its mass number !

Hydrogen------1=no neutrons

The isotope of hydrogen: deuterium,tritium,hydrogen---4 to 7 will have neutrons


But almost all the hydrogen atoms have no neutrons,reason is the N/A of hydrogen -------1 is very high, nearly 100%.

2010-02-23 11:24:33 補充：
Data in my answer is from wikipedia and Chemistry books.

Yes , Some hydrogen atoms do not have neutron.

But some are not!

And all hydrogen atoms have one proton and one electon only.

Why? No reasons!


氫原子 基本上有3隻 同位素(isotope)

氕 , 氘 , 氚

氕 係無中子(neutron)

氘 有一個中子

氚 有兩個中子



而係實驗室製造出尼 ge 氫同位素之中 仲有 4隻

4H , 5H , 6H , 7H

分別有 3 , 4 , 5 , 6個中子



2010-02-20 14:38:38 補充：
同位素資料 from ::
http://zh.wikipedia.org/zh-tw/%E6%B0%AB%E7%9A%84%E5%90%8C%E4%BD%8D%E7%B4%A0