Quantum Chemistry Basics

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

• Uncertainty Principle

Name the scientist who created an equation to treat the electron as a wave

• Planck

• Heisenberg

• de Broglie

• Schrodinger

The square of the magnitude of the wave function is called_________

• Current density

• Probability density

• Zero density

• Volume density

A ____ is a discrete, quantized bundle of energy

• Photoelectric effect

• Photon

• Quantized

• Proton

The de-Broglie wavelength of an electron is 5 Angstrom. Then its momentum is

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An electron is moving freely with kinetic energy 10 eV. It's de-Broglie wavelength is

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The photoelectric effect only occurs if the light shining on the metal is:

• coherent.
• above a minimum intensity.
• above a minimum frequency.
• above a minimum wavelength.

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.

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

Electrons move in a set path, and can only have certain energy levels

• Neils Bohr

• Louis DeBroglie

• Werner Heisenberg