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Quantum Mechanics
Page 3
Questions (730)
A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength
4 answers
asked by
melanie
2,545 views
Q1:Find the phase and group velocities of the de Broglie waves of an electron whose kinetic energy is 500kev?
3 answers
asked by
Shah Rukh
2,030 views
Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen
4 answers
asked by
Daniel
6,452 views
How fast should a 58.1g tennis ball travel to have a de Broglie wavelength that is equal to that of a photon of green light
3 answers
asked by
Josh
1,448 views
1. what is the quantum numbers of the last electron of Sb?(n= l= ml= ms=)
and why the answer are this number? 2.how many
3 answers
asked by
leon
1,776 views
An energetically excited hydrogen atom has its electron in a 5f subshell. The electron drops down to the 3d subshell, releasing
3 answers
asked by
IRA
937 views
The lines in the visible portion of the hydrogen spectrum are called the Balmer series, for which m=2 in the Rydberg equation.
3 answers
asked by
IRA
651 views
Calculate the frequency of an electron traveling at
1.85 X 10^7 m/s. Since the velocity and mass of the electron are known, I
3 answers
asked by
Stesson
2,496 views
A proton in a linear accelerator has a de Broglie wavelength of 115pm. What is the speed of the proton?
5 answers
asked by
Anonymous
1,245 views
The electron in a certain hydrogen atom has an angular momentum of 6.834 × 10-34 J·s. What is the largest possible magnitude
3 answers
asked by
Lindsay
1,405 views
In a typical electron microscope, the momentum of each electron is about 1.4 10-22 kg-m/s. What is the de Broglie wavelength of
4 answers
asked by
Anonymous
1,728 views
The term degeneracy means the number of different quantum states of an atom or molecule having the same energy. For example, the
3 answers
asked by
Lance
429 views
A hydrogen atom electron in an excited state with n = 7 drops to a lower energy state with n = 3. What is the wavelength of the
3 answers
asked by
Kamila
1,208 views
what are the four quantum numbers of the last electron of As
this is what i have n=4 l=1 ms= 1/2 i don't know how to calculate
4 answers
asked by
Laura
1,001 views
Posted on April 12.
From the information below, identify element X. a. The wavelength of the radio waves sent by an FM station
3 answers
asked by
Gabriela
1,163 views
what are conditions in which quantum Mechanics is best suited? what are the conditions in which special relativity is best
3 answers
asked by
Armaan Bains
524 views
The uncertainty principle is ___.
the idea that items like electrons can be described as both a particle and a wave regions in an
3 answers
asked anonymously
64 views
The wave particle duality of matter is ___.
the inability to describe the perfect position and motion at which an object moves a
3 answers
asked anonymously
42 views
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the
4 answers
asked by
Joseoh
2,294 views
A photon has a frequency of 7.3 × 10–17 Hz. Planck’s constant is 6.63 × 10–34 J•s.
The energy of the photon, to the
5 answers
asked by
Chelsea
4,236 views
find the energy of first excited state of helium
1 answer
asked by
annie
365 views
What is the de Broglie wavelength of a 5.0-eV electron?
3 answers
asked by
Anonymous
1,177 views
Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V
3 answers
asked by
Laila
972 views
A photon with a wavelength (λ) of 3.091 x 10–7 m strikes an atom of hydrogen. Determine the velocity (in meters/second) of an
3 answers
asked by
adex
617 views
What potential difference is required in an electron microscope to give electrons a wavelength of 0.05 nm ?
3 answers
asked by
David E
1,812 views
The interatomic spacing in a crystal of table salt is 0.281 nm. This crystal is being studied in a neutron diffraction
3 answers
asked by
Matt
936 views
Use de Broglie's relationship to determine the wavelength of carbon atom moving at 2.3 x 10^5 m/s.(Hint: First determine the
3 answers
asked by
Jessica
627 views
What is the de Broglie wavelength of an oxygen molecule, O2 traveling at 521 m/s? Is the wavelength much smaller or much larger
2 answers
asked by
Lauren
643 views
A hydrogen atom’s electron moves from the n=4 level to the n=6 level. What is the wavelength of light associated with this
4 answers
asked by
lea
1,288 views
The mass of an electron is 9.11 x 10^-31 kg. What is the uncertainty in the position of an electron moving at 2.00 x 10^6 m/a
3 answers
asked by
Jaymie
769 views
Find out the energy of emitted photon when an electron in Li2+ ion returns to its ground state from n=2 level.
3 answers
asked by
Wendy
989 views
A particle of mass 2.00×10^−10 kg is confined in a hollow cubical three-dimensional box, each edge of which has a length,
3 answers
asked by
Anon
1,405 views
What is the energy of a photon in J emitted by the transition from the ni = 4 to the nf = 2 of a hydrogen atom?
2 answers
asked by
Anon
726 views
A proton in a linear accelerator has a de Broglie wavelength of 138pm .
What is the speed of the proton?
2 answers
asked by
kim
975 views
A certain rifle bullet has a mass of 6.45 g. Calculate the de Broglie wavelength of the bullet traveling at 1817 miles per hour.
4 answers
asked by
brianna
1,423 views
The energy (in joules) of an electron energy level in the Bohr atom is given by the expression: En = -2.179 x 10-18/n2 J where n
3 answers
asked by
Andy
542 views
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.77 nm. It then gives off a photon having a
3 answers
asked by
marie
1,629 views
The sizes and shapes of the hydrogen atom orbitals was revealed through graphical analysis of the corresponding wave functions.
3 answers
asked by
anonymous
1,635 views
An electron in the n=5 level of an H atom emit a photon of wavelength 1281nm. To what energy level does the electron move?
3 answers
asked by
Yeneta
1,718 views
How many electrons in an atom can have each of the following quantum number or sublevel designations?
1. n = 4, l = 3
4 answers
asked by
Chris
1,371 views
How do you do this problem, I want to know how to set it up for a quiz tomorrow.
An electron moves from n=5 to n=1 quantum level
3 answers
asked by
Karth
987 views
Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the
3 answers
asked by
Jenny
2,427 views
How can the energy levels of electrons be determined by measuring the light emitted from the atom?
3 answers
asked by
Amanda
782 views
I'm supposed to find the quantum numbers for a 5py orbital. I'm not sure how to do this, can anyone help?
N=5 l = 4 3 2 1 0, for
3 answers
asked by
John
556 views
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the
1 answer
asked by
Desire
137 views
What are the possible sets of quantum numbers for the following orbitals
7p 6d 5s 4d
3 answers
asked by
Kyle
388 views
list the values for the four quantum numbers for each electron in fluorine
4 answers
asked by
Janet L McMillin
763 views
If the energy of a photon is 1.32 × 10^-18 J, what is its wavelength in nm?
2 answers
asked by
Akuyra
2,060 views
calculate the energies of the states of the hydrogen atom with n=2 and n=3, and calculate the wavelength of the photon emitted
2 answers
asked by
masre man
1,182 views
An electron in a hydrogen atom makes a transition from an energy state of principal quantum numbers ni to n=2.If the photon
3 answers
asked by
hellen
1,560 views
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