- The wavelength of the first line of the Lyman series for hydrogen atom is 1216 Å. The wavelength of the second line of the same series is given by
λ = 1216 Å * 9/16 = 608 Å
So the answer is (a).
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The electronic configuration of an element is 1s22s22p63s23p63d54s1. The element is chromium.
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The energy of an electron in the first Bohr orbit of the hydrogen atom is -13.6 eV. The energy value of the electron in the second Bohr orbit of the hydrogen atom is given by
E = -13.6 eV/n^2 = -13.6 eV/2^2 = -6.8 eV
So the answer is (b).
