Atomic Energy Levels. An atom in the second excited state (n =
3) of H is just barely ionized when a photon strikes the atom—what
is the wavelength of this photon? (Assume that all of the photon’s
energy went into the atom.)
This question relates to energy levels in the hydrogen atoms.
Calculate the energy change when an electron is promoted from
the n = 2 to the n = 9 level in a hydrogen atoms
If the electron falls back from the n = 9 to the n = 2 level,
calculate the wavelength of light corresponding to this
transition.
If the range of visible light is from 400nm to 750nm, in which
region of the electromagnetic spectrum will this emitted...
Calculate the separation energy of 16O into an alpha
particle and a 12C nucleus
Calculate the separation energy of 16O into an proton
and a 15N nucleus
H-2 has an atomic mass of 2.013098 u. Calculate its binding
energy.
Calculate the binding energy per nucleon for H-2.
A clock mechanism at rest has a period of exactly 1 second. When
this clock is observed while moving with a speed of 0.89 c, what is
its period?
(i) Derive a generic relationship between the separation of
vibrational energy levels, ΔG, and the vibrational quantum number
for an arbitrary transition from v to v + 1. [3 marks]
(ii) What factors influence the strength of transitions between
two, bound electronic states of a molecule? [3 marks]
(iii) Explain why the rotational constant is different for
different vibrational energy levels. A diagram may be helpful. [3
marks]
(iv) Use a diagram to show differences between the experimental
measurement of...
Calculate the binding energy per nucleon (in J) for
2H and 3H. The atomic masses are 2.014102 u
for 2H, and 3.016049 u for 3H. (Enter
unrounded values. Assume that the mass of 11H
= 1.007825 u,mp = 1.007275 u,
mn = 1.008666 u, and me =
0.000549 u, respectively.)
calculate the pi-electron energy levels and the total pi-electron
energy of bicyclobutadiene.
comment on the stability of bicyclobutadiene with respect to
cyclobutadiene.
go on to solve the secular equations to obtain the orbital
coefficients of the 4 molecular orbitals and hence obtain the
pi-charge distributions at each of the atoms.