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From the data in Table 24.1 , what wavelength photon can ionize helium? What wavelength can ionize uranium?
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From Table 24.1, we can see that the ionization energy for helium is 24.6 eV, and for uranium, it is 6.2 eV. Show more…
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From the data in Table 24.1, what photon wavelength can ionize Oxygen? What wavelength can ionize Silicon? TABLE 24.1 Composition of a Typical Star, Our Sun Element Number of Protons (Atomic Number) Relative Number of Atoms Percentage by Mass Energy to Remove Outermost Electron Hydrogen 1 10^12 71.1% 2.179 x 10^-18 J Helium 2 9.64 x 10^10 27.4% 3.940 x 10^-18 J Carbon 6 2.88 x 10^8 0.25% 1.804 x 10^-18 J Nitrogen 7 7.94 x 10^7 0.08% 2.328 x 10^-18 J Oxygen 8 5.75 x 10^8 0.65% 2.182 x 10^-18 J Neon 10 8.91 x 10^7 0.13% 3.454 x 10^-18 J Silicon 14 4.07 x 10^7 0.06% 1.306 x 10^-18 J Iron 26 3.47 x 10^7 0.14% 1.266 x 10^-18 J Gold 79 8 0.00000011% 1.478 x 10^-18 J Uranium 92 0.4 <0.000000007% 0.992 x 10^-18 J The wavelength of a photon that can ionize Oxygen is λOxygen = nm. The wavelength of a photon that can ionize Silicon is λSilicon = nm.
The wavelength of one of the spectral lines of helium is 492 nm. What is the energy of a photon with this wavelength?
A photon with a wavelength of less than 50.4 $\mathrm{nm}$ can ionize a helium atom. What is the ionization potential of helium?
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