Question

Shows the energy-level diagram of hydrogen like imaginary element X. (hc = 1242 eV-nm)

(A) The ionization energy of element X is 4eV.

(B) An atom in the ground state absorbs a photon, comes to an
excited state then emits a photon with a wavelength of 1242 nm.
The incident photon must have a wavelength of 414 nm.
(C) An atom in the ground state has a collision with an electron, then emits a photon with a wavelength of 1242 nm. The incident electron must have energy of 3 eV.
(D) An atom in the ground state absorbs a photon, comes to an excited state then emits a
photon with a wavelength of 1242 nm. The incident photon must have a wavelength of
1242 nm.
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Answer 1

Answer:

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Explanation:

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