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Quantum physics
Quantum physics
40 terms
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End of term...quiz
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1
Which of the following is not radioactive emission?
alpha
gamma
proton
beta
2
Natural radioactive decay occurs when the nucleus of an atom is
frustrated
exposed to radiations
unstable
stable
3
Which radioactive emission has the highest penetrating ability?
alpha
gamma
what is going on !!!!
beta
4
Process where waves travelling through a small hole, slit or around a boundary will spread out.
magic........
wavelength
Diffreaction
Interfernce
5
This iron has ___ protons.
56
30
26
81
6
Neutrons and protons are ____
atoms
isotopes
nucleons
nuclides
7
According to the Bohr model of the atom
electrons in orbit around nuclei lose energy
quantum theory is not applicable
electrons around a nucleus have only certain energies
8
Max Planck proposed that
energy of a photon is linked with its amplitude
to explain the spectrum emitted , the energy is in quanta
light consists of photons.
the absorption of light by so-called black bodies.
9
Fluorine has atomic number 9 and an atomic mass of 19, how many protons?
10
22
9
19
10
This radioactive emission is the same as the nucleus of a helium atom
alpha
gamma
beta
11
What was the main contribution of Heisenberg to atomic theory
Uncertainty Principle
Certainty Principle
Something about waves and particles
12
The de Broglie wavelength of an object is equal to
Planck's constant divided by the momentum of the object.
speed of light or faster
velocity of the particle
13
The process responsible for transforming one element into another is
transmutation
transmitation
transmitting
14
When an atom absorbs a photon, one of its orbital electrons
jumps from a higher to a lower energy level
turns into gamma radiation
is absorbed by the nucleus
gains energy
15
Who discovered that atoms have a nucleus?
Rutherford
Fermi
Bohr
Dalton
16
You can tell the difference between an beta particle and an electron by
comparing their charge
comparing their level of deflection
comparing their speed
comparing their mass
17
Which form of radiation
can be stopped
by a piece of paper
gamma
alpha
beta
18
The mass number is the
number of neutrons
number of electrons
number of protons
number of protons and neutrons
19
Neutrons, protons and electrons are all
nuclides
subatomic particles
isotopes
nucleons
20
The concepts of a "particle" and a "wave"
distinct from one another in classical and modern physics.
all of the above are true.
have found little use in quantum physics.
can both be applied to electromagnetic radiation
21
Planck's constant is used to find
nothing
is not really constant
quantum energy associated with a certain frequency of light.
inverse of Einstein's constant.
22
Who used the spectral line of Hydrogen to determine that electrons have energy levels?
Bohr
Dalton
Rutherford
Fermi
23
This radioactive emission has the same charge as an electron.
beta
aplha
gamma
24
An atom is said to be in an excited state when it has one or more electrons
inside the nucleus
in a larger orbit than the smallest possible orbits
at rest
in its lower energy level
25
Observation when electric current is passed through a low pressure hydrogen gas discharge tube
Rainbow
Streaks of light
White light
Hydrogen spectrum
26
This radioactive emission has no charge.
beta
gamma
alpha
27
Wolfgang Pauli concluded that
only one electron in atom can exist in a given quantum state
there is unique set of quantum numbers for every single atom
quantum numbers for a particular electron can never change
28
6 is the ______ of carbon
isotope
nucleon number
mass number
atomic number
29
Earth's pull on every object
Magnetic
Gravitational force
Forces that act at a distance
Gravy
30
The range of the strong nuclear force is approximately:
The diameter of an atom
The diameter of a nucleus
The radius of an atom
The radius of a nucleus
31
Matter waves
contradict the concept of photons as proposed by Einstein
are most significant at the atomic and subatomic level
only make good common sense
always associated with particles and photons in any state
32
E=hf is ______
Bohr's postulate
Electric current
Energy....simple!!
33
Contrast the properties of neutrons and neutrinos
Neutrinos are charged but neutrons are netural
Neutrons are small as compared to neutrinos
Neutrons have mass but neutrinos don't
34
The existence of neutrino was suggested by_____ and the name 'neutrino' was coined by___
Fermi, Pauli
Cowan , Pauli
Rutherford, Pauli
Pauli, Fermi
35
Which has
not
been used as an atomic model of the atom?
Rutherford-Bohr Model
Plum Pudding Model
Cookie Model
Bohr Model
36
The
splitting
of an atomic nucleus into
two smaller pieces
is called what?
Nuclear fission
Nuclear fusion
Radiation
Energy
37
To detect the presence of alpha, beta and gamma radiation, we use_____
Wilson cloud chamber
dry ice
nuclear bomb
38
A beta particle occurs because
a electron enters the nucleus
a neutron changes into a proton and energy
a neutron changes into a proton and electron
a proton changes into a neutron and electron
39
An important implication of the uncertainty principle discovered by Werner Heisenberg is
possible to predict future based on present conditions
we can never predict the future with absolute certainty
insignificant that they drop to zero
40
The number of protons and neutrons in an atom is
nuclide
nucleon number
isotope
atomic number
