From Wikipedia, the free encyclopedia
电离能(Ionization energy),或称游离能、电离焓,常简记为EI,指个是奈一个电子从一个孤立个原子、离子或分子移到无限远处所需个能量。更广义个用法,第一电离能定义为气态原子失去一个电子成为一价气态正离子所需个最低能量,记作I1;气态一价正离子失去一个电子成为气态二价正离子所需个能量称为第二电离能,记作I2。依此类推。
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