O2 can only be ionized by light with a maximum wavelength of 99.39 nm.
The ionization energy measures an element's ability to participate in chemical processes that call for the creation of ions or the donation of electrons.
ionization energy of O2 = 1205 kJ
energy = hv
= h × wavelength/speed of light
wavelength = 1205000× 3 ×10⁸ /6.626 ×10³⁴
wavelength = 99.39 nm.
He is symbolized by the highest ionization energy. The outermost shell has a high ionization energy, is stable, and does not frequently become unstable due to electron loss. Ionization can be induced by waves with energies greater than 134 nm. 225nm light lacks the energy to ionize gold because it is greater than 134nm.
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