LEVEL 1
What is the minimum energy required to remove an electron from an atom's outer shell?
a. Kinetic energy
b. Threshold energy
c. Potential energy
d. Quantum energy
b. Threshold energy
The quantum numbers of an electron include:
a. Principal, azimuthal, and magnetic
b. Principal, magnetic, and spin
c. Azimuthal, magnetic, and spin
d. Principal, azimuthal, and energy
b. Principal, magnetic, and spin
In the double-slit experiment, what is observed when particles are fired through two slits?
a. Particle interference
b. Wave interference
c. Particle diffraction
d. Wave diffraction
b. Wave interference
The Pauli Exclusion Principle states that:
a. No two electrons in an atom can have the same set of quantum numbers.
b. Electrons move in fixed orbits around the nucleus.
c. Electrons exhibit both wave and particle properties.
d. Electrons have quantized angular momentum.
a. No two electrons in an atom can have the same set of quantum numbers.
The concept of quantized energy levels in atoms was proposed by:
a. Max Planck
b. Niels Bohr
c. Albert Einstein
d. Erwin Schrödinger
b. Niels Bohr
Who proposed the wave-particle duality of electrons?
a. Max Planck
b. Albert Einstein
c. Niels Bohr
d. Louis de Broglie
d. Louis de Broglie
What is the unit of Planck's constant (h)?
a. Js (joule-second)
b. J/kg (joule per kilogram)
c. s/kg (second per kilogram)
d. J (joule)
a. Js (joule-second)
Who introduced the concept of quantum numbers?
a. Max Planck
b. Niels Bohr
c. Erwin Schrödinger
d. Louis de Broglie
c. Erwin Schrödinger
What is the term for the smallest unit of electromagnetic radiation?
a. Quanta
b. Photon
c. Electron
d. Wavepacket
b. Photon
What is the term for a pair of particles that are entangled?
a. Dual particles
b. Quantum buddies
c. Superpartners
d. Einstein-Podolsky-Rosen (EPR) pairs
d. Einstein-Podolsky-Rosen (EPR) pairs
What does the Heisenberg Uncertainty Principle state?
a. The position and momentum of a particle can be precisely determined simultaneously.
b. It is impossible to simultaneously know the exact position and momentum of a particle.
c. Energy and time are independent variables in quantum mechanics.
d. Electrons revolve around the nucleus in fixed orbits.
b. It is impossible to simultaneously know the exact position and momentum of a particle.
Who proposed the concept of quantized angular momentum?
a. Max Planck
b. Niels Bohr
c. Werner Heisenberg
d. Erwin Schrödinger
b. Niels Bohr
What is the term for the specific values that a quantum mechanical property can take?
a. Quanta
b. Eigenvalues
c. Constants
d. Variables
b. Eigenvalues
What is the relationship between the frequency (ν) and wavelength (λ) of a wave in quantum mechanics?
a. ν = λ
b. ν = c/λ
c. λ = c/ν
d. λ = 2πr
c. λ = c/ν
Which property of electrons is described by the magnetic quantum number?
a. Spin
b. Angular momentum
c. Orbital shape
d. Principal energy level
c. Orbital shape
Which equation describes the wave nature of particles?
a. Schrödinger equation
b. Bohr's equation
c. Planck's equation
d. Einstein's equation
a. Schrödinger equation
The photoelectric effect is explained by the emission of:
a. Protons
b. Electrons
c. Neutrons
d. Photons
b. Electrons
Which of the following is an example of a subatomic particle with a half-integer spin?
a. Electron
b. Proton
c. Neutron
d. Positron
b. Electrons
The spin quantum number of an electron can have values:
a. +1/2, -1/2
b. 0, +1, -1
c. 1, 2, 3
d. +1, 0, -1
a. +1/2, -1/2
The concept of quantized angular momentum is a result of:
a. Bohr's model
b. Schrödinger's wave equation
c. Heisenberg's Uncertainty Principle
d. Pauli Exclusion Principle
c. Heisenberg's Uncertainty Principle
What is the term for the discrete energy levels in which electrons orbit the nucleus?
a. Energy bands
b. Photon shells
c. Quantum shells
d. Electron orbits
c. Quantum shells
What does the principal quantum number determine?
a. Energy level
b. Orbital shape
c. Spin of the electron
d. Angular momentum
a. Energy level
What is the probability density function used in quantum mechanics to describe the position of an electron?
a. Maxwell's distribution
b. Normal distribution
c. Wavefunction
d. Probability wave
c. Wavefunction
Which experiment demonstrates the particle-wave duality of electrons?
a. Photoelectric effect
b. Davisson-Germer experiment
c. Rutherford scattering
d. Stern-Gerlach experiment
b. Davisson-Germer experiment
What is the term for the energy required to move an electron from one energy level to another?
a. Ionization energy
b. Excitation energy
c. Quantum energy
d. Binding energy
b. Excitation energy