Quantum Mechanics

What is the equation for Planck's Law?

• Energy of a photon = Planck's constant * frequency of light

• Energy of a photon = Planck's constant / frequency of light

• Energy of a photon * Planck's constant = frequency of light

• Energy of a photon = Planck's constant = frequency of light

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Energy could only fit in discreet packets called _____.

• particles

• blackbodies

• protons

• quanta

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The minimum amount of energy needed to cause an electron to be ejected is called the _____.

• light function

• work function

• energy function

• photo function

What term describes how in some circumstances light can behave like a particle and other circumstances it can behave like a wave?

• particle-wave schima

• Planck's particle dual behavior

• wave-particle duality

• particle-wave behavior principle

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In the quantum-mechanical model of the atom, an orbital is defined as a

• region of the most probable proton location.

• region of the most probable electron location.

• circular path traveled by an electron around an orbital.

• circular path traveled by a proton around an orbital.

Answer explanation

In the quantum-mechanical model of the atom, an orbital is defined as a region of the most probable electron location.

When applied to the quantum mechanics, the Pauli Exclusion Principle states

• no two electrons can have the same four quantum numbers.

• no two atoms can have the same location.

• the location and momentum of an electron cannot be determined at the same time.

• the electrons are excluded from the nucleus.

The Heisenberg Uncertainty Principle states that:

• We can know both the position and velocity of a particle with absolute certainty.

• The more precisely we know a particle's position, the less precisely we can know its momentum.

• Particles do not have a definite position.

• Particles can be in two places at once.

When are photons of light released?

• When electrons move from the ground state to the excited state

• When electrons move from the excited state to the ground state

• When electrons stay in the same orbital.

• When the distance to the nucleus increases.

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Whose model is based on the Uncertainty Principle?

• Schrodinger / Heisenberg

• Bohr

• Rutherford

• Thomson

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The quantum mechanics or wave mechanics model, which described the atom using a three dimensional system of waves, was developed by.

• Max Planck

• Albert Einstein

• Erwin Schrodinger

• Louis de Broglie

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