🏆 which
Which element has the highest first ionization energy?
Quick Answer
Helium has the highest first ionization energy of any element, at 24.59 eV.
The Full Story
Helium holds its outer electrons more tightly than any other element, which gives it the highest first ionization energy. Its first ionization energy is 24.59 electronvolts, a reflection of its small size and stable electron configuration. This makes helium very reluctant to form compounds or lose an electron. It is one reason helium is chemically inert and widely used where nonreactivity is important.
Key Facts
1.Helium first ionization energy: 24.59 eV
2.Element symbol: He
3.Atomic number: 2
YouTube Angle
Suggested video title for this topic:
"The hardest element to strip an electron from"
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.