Question

A hydrogen atom at rest is initially in an excited state corresponding to n = 5.

a- Give the quantum numbers (l) and (m) which correspond to n = 5

b- What is the ionization energy of the atom in this state?

c- What is the frequency of the photon emitted when it returns to its ground state n = 1?

d- Estimate the momentum and the kinetic energy of the atom's recoil during the photon emission.

mH= 1.007825? 1? = 1.6605. 10^-27kg

Answer #1

The electron in a hydrogen atom falls from an excited energy
level to the ground state in two steps, causing the emission of
photons with wavelengths of 656.5 nm and 121.6 nm (So the in the
first step the 656.5 nm photon is emitted and in the second step
the 121.6 nm photon is emitted). What is the principal quantum
number (ni) of the initial excited energy level from which the
electron falls?

A hydrogen atom is initially at n=2 excited state and then
absorbs energy 2.86 eV. The excited state is unstable, and it tends
to finally return to its ground state. 8%
(a) How many possible wavelengths will be emitted as the atom
returns to its ground state? (also draw a diagram of energy levels
to illustrate your answer)
Calculate the second shortest wavelength emitted.

A hydrogen atom is initially at n=2 excited state and then
absorbs energy 2.55 eV. The excited state is unstable, and it tends
to finally return to its ground state.
(a) How many possible wavelengths will be emitted as the atom
returns to its ground state? draw a diagram of energy levels to
illustrate answer
Answer: (number) ________
(b) Calculate the shortest wavelength emitted.
Answer: ________

A hydrogen atom (Z=1) is in the third excited state. It makes a
transition to a different state, and a photon is either emitted or
absorbed. Answer the following conceptual questions:
What is the quantum number of the third excited state?
When an atom emits a photon, is the final quantum number of the
atom greater than or less than the initial quantum number?
When an atom absorbs a photon, is the final quantum number of
the atom greater than...

A hydrogen atom (Z = 1) is in the third excited state, and a
photon is either emitted or absorbed. Determine
(a) the quantum number nf of the final state
(b) the energy of the photon when the photon is emitted with the
shortest possible wavelength
(c) the quantum number nf of the final state
(d) the energy of the photon when the photon is emitted with the
longest possible wavelength
(e) the quantum number nf of the final state...

1. a. A photon is absorbed by a hydrogen atom causing an
electron to become excited (nf = 6) from the ground state electron
configuration. What is the energy change of the electron associated
with this transition?
b. After some time in the excited state, the electron falls from
the n = 6 state back to its ground state. What is the change in
energy of the electron associated with this transition?
c. When the electron returns from its excited...

A hydrogen atom is in its third excited state. The atom emits a
1.88E+3nm wavelength photon. Determine the maximum possible orbital
angular momentum of the electron after emission. Express your
answer as multiples of hbar.

in the problem, you can assume a "hydrogen-like" nucleus. You
have a selenium atom, with an electron in the 5th excited state.
The electron undergoes spontaneous emission and Is in the third
excited state.
a.) what is the energy of the photon emitted?
b.) what is the frequency of the photon?
c.) what is the difference in the radius of the orbits?

Astronomers have detected hydrogen atoms in interstellar space
in the n =744 excited state. Suppose an atom in this excited state
undergoes a transition from n =744 to n = 731.
What is the atom's change in energy as a result of this
transition?
What is the wavelength of radiation corresponding to this
transition?
What kind of telescope would astronomers need in order to detect
radiation of this wavelength?

Consider the first three energy levels of hydrogen (n = 1, 2,
3).
a) What photon energies can be observed from transitions between
these levels? Label these in increasing order as E1,
E2, and E3.
b) A hydrogen atom which is initially in the n = 2 level
collides with an aluminum atom in its ground state (the kinetic
energy of the collision is nearly zero). The hydrogen can drop to
the n = 1 level and ionize the aluminum...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 3 minutes ago

asked 3 minutes ago

asked 3 minutes ago

asked 6 minutes ago

asked 6 minutes ago

asked 8 minutes ago

asked 9 minutes ago

asked 10 minutes ago

asked 11 minutes ago

asked 11 minutes ago

asked 13 minutes ago