Ionization energy for He gas tubes

AI Thread Summary
Helium can be ionized despite having the highest ionization energy among the noble gases, requiring an energy input of 24.6 eV to remove one of its electrons. This process is feasible in laboratory conditions and occurs naturally in stars, including the sun, where helium atoms are ionized. The discussion highlights that while ionization may seem challenging, it is achievable with sufficient energy. The sun's ability to ionize helium serves as a natural example of this phenomenon. Ionization of helium is a significant process in both astrophysics and experimental physics.
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Could we ionize He also if it has the biggest ionization energy?
 
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Yes, we could - provide an energy of 24.6 eV to an He atom, and it will say goodbye to one of its electrons. And even if WE could not do so for whatever reason (stupidity ? laziness ?) our sun does this to its He atoms.
 

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