8D.1 Which of the following transitions are allowed in the electronic emission spectrum of an hydrogenic atom: (a) 2s 1s, (b) 2p → 1s, (c) 3d →2p, (d) 5d → 2s, (e) 5p → 3s, (f) 6f4p?

Which of the following transitions are allowed in the electronic emission spectrum of a hydrogenic atom: (i) 5d → 2s, (ii) 5p → 3s, (iii) 6p → 4f?

Which of the following transitions are allowed in the electronic emission spectrum of an hydrogenic atom:(a) 2s →1s. (b) 2p → 1s. (c) 3d → 2p. (d) 5d → 2s. (e) 5p →3s. (f) 6f → 4p?

P7E.5 In infrared spectroscopy it is common to observe a transition from the v = 0 to v = 1 vibrational level. If this transition is modelled as a harmonic oscillator, the energy of the photon involved is ħo, where o is the vibrational frequency. (a) Show that the wavenumber of the radiation corresponding to photons of this energy, v, is given by v=@/2nc, where c is the speed of light. (b) The vibrational frequency of 'H*Cl is w = 5.63 x 10“s"; calculate v. (c) Derive an expression for the force constant k, in terms of v. (d) For "C"O the v = 0 →1 transition is observed at 2170 cm. Calculate the force constant and estimate the wavenumber at which the corresponding absorption occurs for "C*O. Use integer relative atomic masses for this estimate.

A normalized wavefunction for a particle confined between 0 and L in the x direction is ψ = (2/L)1/2 sin(πx/L). Suppose that L = 10.0 nm. Calculate the probability that the particle is (a) between x = 4.95 nm and 5.05 nm, (b) between x = 1.95 nm and 2.05 nm, (c) between x = 9.90 nm and 10.00 nm, (d) between x = 5.00 nm and 10.00 nm.

what is the absolute energy (wavenumbers) for hydrogn from n=6 to n=1

7A.1b) Calculate the size of the quantum involved in the excitation of (i) an electronic oscillation of period 2.50 fs. (ii) a molecular vibration of period 2.21 fs, (iii) a balance wheel of period 1.0 ms. Express the results in joules and kilojoules per mole. 7A eje of 7A ele

The electronic spectrum of the molecule butadiene, H2C=CH–CH=CH2, can be approximated using the one-dimensional particle-in-a-box if one assumes that the conjugated double bonds span the entire four-carbon chain. If the electron absorbing a photon having wavelength 217 nm is going from the level n =2 to the level n =3, what is the approximate length of the C4H6 molecule?

Butadiene can be roughly modeled as a linear “box” with L = 0.424 nm. There are four electrons, two of which can go in each particle in a box state (two electrons in nX= 1; two electrons in nX= 2). The lowest excitation involves promoting an electron from nX= 2 to nX= 3. What is the energy of that excitation?

Which of the following transitions are allowed in the normal electronic emission spectrum of an H atom:(i) 2s → 1s, (ii) 2p → 2s, (iii) 3d → 2p (iv) 3s → 1s (v) 3p → 2s (vi) 4d  →2p? Explain.