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Quantum Mechanics
Page 10
Questions (730)
I just have a couple of questions that I need some help with:
1) A 0.22-caliber handgun fires a 27g bullet at a velocity of
15 answers
asked by
K
858 views
The threshold frequency of sodium is 5.51 × 1014 s^−1. Calculate the kinetic energy of the electrons ejected when the surface
2 answers
asked by
Sam
841 views
a) How many orbitals are in the l = 4 subshell?
b) The maximum number of orbitals that may be associated with the quantum numbers
2 answers
asked by
Alex
844 views
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together
2 answers
asked by
rick
832 views
The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the
2 answers
asked by
Chris
816 views
The Heisenberg Uncertainty Principle:
A student is examining a bacterium under the microscope. The E. coli bacterial cell has a
1 answer
asked by
Anna
823 views
the de broglie wavelength of an electron with a velocity of 6.00 x 10^6 m/s is ____m. the mass of the electron is 9.11 x
3 answers
asked by
Hector
1,934 views
An electron in a hydrogen atom could undergo any of the transitions listed below, by emitting light. Which transition would give
4 answers
asked by
Job
1,268 views
Please help me answer the question below and also show equations and steps of how you came to your answer. Thank you
1. The
1 answer
asked by
jennifer
959 views
The four quantum numbers for the last electron placed in the orbitals of a certain element are: n=3 l=2 m of l=0 and m of
3 answers
asked by
Brittany
824 views
(a) What is the frequency of a photon whose energy is 3.5 times the rest energy of an electron? (b) What would be the linear
2 answers
asked by
joe
808 views
For each electron in a ground-state Be atom, select the set of quantum numbers that represents it. Check all that apply.
n=1 l=0
1 answer
asked by
Anonymous
806 views
help me with this question
2. A hydrogen electron drops from the n=4 level to the n=1 level. A. What is the energy of an emitted
2 answers
asked by
carey
556 views
Suppose that at least 14.7 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the
3 answers
asked by
Niki
805 views
From the information below, identify element X.
a. The wavelength of the radio waves sent by an FM station broadcasting at 97.1
1 answer
asked by
Dianne
792 views
for the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron
6 answers
asked by
lef
782 views
If given the quantum numbers:
2,1,-1,-1/2 give the element. I understand the first two numbers and getting to the p orbitals of
1 answer
asked by
Holly
785 views
The delocalized electrons in a long-chain polyene exist in quantum states that can be reasonably approximated by the particle in
2 answers
asked by
Austin
780 views
What is the subshell designation for an electron with the following set quantum
numbers? 1) n = 1; l = 0 2) n = 3; l = 2; mi = -1
2 answers
asked by
Nate
762 views
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission?
2 answers
asked by
Anonymous
769 views
I have a question from an old exam that I need help to understand, i'm not sure where to start
An electron in an electronically
1 answer
asked by
Dan
759 views
The binding energy of an electron to a metal surface is 184 kJ/mol. What is the threshold wavelength (in nm) for the onset of
3 answers
asked by
Erika
763 views
Suppose that at least 13.0 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the
2 answers
asked by
Julie
768 views
The energy levels the electron can occupy in the He+ ion can be calculated using the energy level equation. Calculate the
4 answers
asked by
tammy
776 views
what is the angular momentum quantum number for the orbital from which an Mg atom loses two electrons to form Mg2+ ion.
2 answers
asked by
kb
731 views
The energy of the electron in the 2s state is -12.98 eV, the energy in the 3s state -10.84 eV. What is the wavelength of the
2 answers
asked by
Tisha
712 views
How am I supposed to answer this question on the lab write-up? I have the date, but I don't know the formula or process to use.
2 answers
asked by
Sadie
730 views
What is the shortest wavelength of light that can be emitted by a hydrogen atom that has an initial configuration of 7p1?
1 answer
asked by
Anonymous
731 views
in an electron microscope, a tungstun cathode with work function 4.5 eV is heated to release electrons that are then initially
2 answers
asked by
shelly
749 views
A 281 lb fullback runs the 40 yd dash at a speed of 23.0 ± 0.1 mi/h.(a) What is his de Broglie wavelength (in meters)?(b) What
3 answers
asked by
bob
738 views
Calculate the de Broglie wavelength, in nanometers, associated with a 145 {\rm g} baseball traveling at a speed of 162km/h
3 answers
asked by
Chironjit
726 views
It is known that the possible values for the magnetic quantum number m range between -9 and +9. Determine the orbital quantum
2 answers
asked by
MIke
741 views
What atomic orbital has the quantum numbers n = 3, l = 1, ml = -1?
3 answers
asked by
HELP
711 views
A molecule of oxygen gas (O2 ) has a velocity of 2800 m / s. What is its de Broglie wavelength?
4 answers
asked by
Anonymous
705 views
Determine the potential (V) by which a proton must be accelerated so as to assume a particle wavelength of 0.0293 nm.
---- This
7 answers
asked by
Will
712 views
Use th relationships of E= hv and c=(upside down v)v to write E in terms of h, c, and upside down v
2 answers
asked by
Raynique
725 views
In defining the sizes of orbitals, why must we use an arbitrary value, such as 90 percent of the probability of finding an
1 answer
asked by
Joseph
675 views
the third quantum number, m, indicates what property of the electron?
a) orbital b) spin c) charge d) energy level
2 answers
asked by
Megan
690 views
Ok so im just totally confused because i don't technically have chemistry teacher (i have cancer so i cant go to school so while
4 answers
asked by
Ana
708 views
The De Broglie wavelength of electrons used in an experiment utilizing an electron microscope is 96.00pm. what is the speed of
2 answers
asked by
Brooke N
716 views
Heisenberg's uncertainty principle can be expressed mathematically as Δx*Δp = h/4π, where Δx and Δp denote the uncertainty
5 answers
asked by
Andy
704 views
Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).
1 answer
asked by
annie
689 views
How fast must a 144 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with =
1 answer
asked by
Megan
686 views
Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass
of 2.0 kg and is initially
1 answer
asked by
Abby
691 views
What does wave interference have to do with the electron energy levels in an atom?
2 answers
asked by
need help :-(
673 views
Calculate the de Broglie wavelength associated with a body of mass 1.5 kg moving with a velocity of 100m/s.
2 answers
asked by
Sparkle
677 views
A particle has a de Broglie wavelength of 3.30 10-10 m. Then its kinetic energy quadruples. What is the particle's new de
2 answers
asked by
jason
705 views
An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the
3 answers
asked by
kunal
694 views
what is the symbolic expression for the wavelength ë of a photon in terms of its energy E, Planck's constant h, and the speed
2 answers
asked by
Jessica
666 views
The work function for a certain metal is 3.00 eV. Calculate the speed of the electrons in m/s ejected by light of wavelength 209
2 answers
asked by
Austin
662 views
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