Quantum Theory and the Atom Quiz

What did Niels Bohr propose in 1913 regarding the hydrogen atom?

• Electrons can occupy multiple orbitals simultaneously

• Electrons have a fixed position within the nucleus

• Electrons behave like particles flying through space

• Electrons move around the nucleus in certain allowed circular orbits

Who hypothesized that particles, including electrons, could have wavelike behaviors?

• Erwin Schrödinger

• Niels Bohr

• Louis de Broglie

• Werner Heisenberg

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What does the Heisenberg uncertainty principle state?

• Particles behave like waves in a model

• It is impossible to know precisely both the velocity and position of a particle at the same time

• Particles have fixed positions within the nucleus

• Particles can occupy multiple orbitals simultaneously

What is the lowest-energy orbital in the quantum-mechanical model of the atom?

• 1s orbital

• 4f orbital

• 2p orbital

• 3d orbital

Which quantum number indicates the energy level of an atomic orbital?

• Azimuthal quantum number (ℓ)

• Principal quantum number (n)

• Magnetic quantum number (mℓ)

• Spin quantum number

What is the set of quantum numbers for an electron in a 2p orbital?

• n=2, ℓ=1, mℓ=0, ms=+1/2

• n=2, ℓ=0, mℓ=0, ms=-1/2

• n=2, ℓ=2, mℓ=0, ms=+1/2

• n=2, ℓ=1, mℓ=1, ms=-1/2

What is the electron configuration of Lithium?

• 1s² 2s² 2p³

• 1s² 2s² 2p¹

• 1s¹ 2s²

• 1s² 2s¹

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Which quantum numbers describe the outermost electron in Lithium?

• n=1, ℓ=0, mℓ=0, ms=-1/2

• n=2, ℓ=1, mℓ=0, ms=+1/2

• n=2, ℓ=0, mℓ=0, ms=-1/2

• n=2, ℓ=0, mℓ=0, ms=+1/2

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Which quantum numbers are permissible sets?

• n=3, ℓ=2, mℓ=1, ms=-½

• n=4, ℓ=4, mℓ=0, ms=½

• n=2, ℓ=0, mℓ=0, ms=³/²

• n=5, ℓ=3, mℓ=-3, ms=½

What did Schrödinger treat electrons as in the quantum-mechanical model?

• Circular orbits

• Fixed entities

• Particles

• Waves

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