Question

Which one of the following transition of an electrons in Hydrogen atom emits radiation of the lowest wave length 1) 2 n =∝ to n1 = 2 2) n2 = 4 to n1 = 3 3) n2 = 2 to n1 = 1 4) n2 = 5 to n1 = 3
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Answer 1

Answer:

The transition n 2 =∞ to n 1 =2 emits radiation of the lowest wavelength. This transition corresponds to maximum energy of emitted radiation. It is equal to the ionization energy and corresponds to the energy required when an electron is completely removed from ground state of hydrogen atom.

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