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WorksheetsQuantum Chemistry
Total questions: 25
Worksheet time: 20mins
Black body radiation
Radiation emitted by black body
Radiation emitted by any material
Radiations not emitted
A ____ is a discrete, quantized bundle of energy
Photoelectric effect
Photon
Quantized
Proton
The diagram shows an atom of uranium-235 being split into several pieces. Name the process shown in the diagram.
nuclear fission
nuclear fusion
chemical reaction
chain reaction
The diagram shows an atom of uranium-235 being split into several pieces. Name the particles labelled X.
neutrons
alpha particles
beta particles
protons
A particle of light is called a...
Photoelectron
Photon
Proton
Electron
What is the best description of 'threshold frequency'?
The minimum energy needed for electrons to escape a surface.
The maximum kinetic energy that an emitted electron has.
The minimum frequency of a photon that will cause an electron to be emitted.
The frequency that an emitted electron will have.
Compton effect expt. is carried out with
x ray
gama ray
visible light
heat waves
Compton scattering establishes
photonic nature of electromagnetic wave
wave nature of electromagnetic wave
both wave and particle nature of electro magnetic
electron is a matter
Elements of low atomic mass are preferred in Compton effect
low atomic mass elements are easily available
with low atomic mass coulombic attaraction is less and greater probability of making electron free
with low atomic mass coulombic attaraction is high and greater probability of making electron free
with low atomic mass coulombic attaraction is less and lesser probability of making electron free
In Compton effect we use X-ray because
it is easy to produce
it has very small wave length
x-ray photon has very high energy
it is a X-ray diffraction experiment
Compton wave length is
m0Ch
mch
λCh
(1−Cosα)
Compton Shift given by Δλ=λc(1−Cosα) becomes maximum at
scattering angle equal to 90 degree
scattering angle equal to 0 degree
scattering angle equal to 180 degree
scattering angle equal to 360 degree
Wave particle duality means
a wave can show wave behavior
a particle can show particle behavior
a wave can some times show the property of particle
a wave can some times show the property of wave and matter both
Which one of the following is most suitable for Compton effect
Heat waves
X-ray
gama ray
visible light
Electrons move in a set path, and can only have certain energy levels
Neils Bohr
Louis DeBroglie
Werner Heisenberg
De Broglie equation
relates the momentum of a mass to its wavelength
relates the energy of a mass to its wavelength
relates the frequency of a mass to its wavelength
relates the work function of a mass to its wavelength
If waves can behave like particles, then particles can behave like a wave. This is the idea behind...
Quantization of Energy
Photoelectric Effect
Compton Effect
deBroglie Waves
An electron cloud
represents a 50% probability of finding an electron
has uniform density
can be called an orbital
can only show where the electron is not located
SHOW ANSWER
The de Broglie wave equation showed that the wavelength of any moving object is equal to
m/hν
h/mv
v/mh
hm/v
Determined that electron paths cannot be predicted and exist inside the Electron Cloud.
John Dalton
Ernest Rutherford
Schrodinger & Heisenberg
Bohr
