Self-test questions: Focus 08

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Calculate the wavelength of the lowest energy transition in the Brackett series of the electronic spectrum of the Li+ ion.  The Rydberg constant for He is RLi = 109729 cm–1.

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A line in the Paschen series of the emission spectrum of atomic hydrogen is observed at a wavenumber of 7800 cm–1.  Deduce the upper state principal quantum number for this transition.

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Calculate, from the fundamental constants, the value of the Rydberg constant for a deuterium atom.

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What is the degeneracy of the energy level with n = 6 in a hydrogenic atom or ion?

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How many nodes does a 4d orbital possess?

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The change in energy when an electron is transferred between a neutral potassium and a neutral bromine atom to produce a positively charged potassium cation and negatively charged bromine anion

K(g) + Br(g) ® K+(g) + Br(g) is 93.6 kJ mol–1.  The ionization energy of a potassium atom is 4.34 eV.  Calculate the electron affinity of a neutral bromine atom.

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To which orbitals may an electron in a 2p orbital in a hydrogenic atom make allowed spectroscopic transitions?

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What terms can arise from the configuration 2p13p1?

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Predict the levels that may arise from a 2P term of an excited potassium atom.

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Atomic carbon, C, has a ground electronic configuration that gives rise to the levels 3P2,1,0, 1D2 and 1S0.  Use Hund's rule to predict which of these levels is lowest in energy.

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