deBroglie, Heisenberg & Schrödinger Review

Which equation is used to calculate the wavelength associated with matter?

• c = λν

• λ = c/ν

• λ = h / mv

• λ = ch / E

Tags

NGSS.HS-PS4-1

What do the different parts of the de Broglie equation (λ = h / mv) equal?

• h = Planck's constant, m = meters, v = frequency

• h = Planck's constant, m = meters, v = velocity

• h = Planck's constant, m = mass, v = frequency

• h = Planck's constant, m = mass, v = velocity

Tags

NGSS.HS-PS4-3

How did the Heisenberg Uncertainty Principle affect the quantum mechanical model?

• You can't know the speed and position of the electron at the same time.

• You can know the speed and position of the electron at the same time.

• You can't know the mass and charge of an electron at the same time.

• You can't know the frequency and wavelength at the same time.

What is the purpose of the Schrödinger's finding?

• We can never know exactly where an electron exists.

• He defined areas around the nucleus called orbitals where the electron is likely to be found.

• We can measure the speed of an electron using different energies of light.

What does it mean to be "quantized"?

• The electron's mass is very small.

• The electron is actually a wave.

• The position & speed of the electron cannot be known at the same time.

• The electron is limited to certain positions in the atom because of specific, fixed energy levels.

The position & speed of the electron cannot be known at the same time.

• Planck

• Heisenberg

• de Broglie

• Schrodinger

Why do we not use Bohr's planetary model today?

• It is too specific; we are not allowed to know the electron's specific location.

• The nucleus was way too large.

• It is too vague; we have more specific information to use now.

• It placed the electrons too close to the nucleus.

How is the Quantum Mechanical Model different from Bohr's planetary model?

• The QMM shows the probability of the electron's location.
• The planetary model shows the probability of the electron's location.
• The QMM shows the exact location of the electron. 
• The QMM does not include a nucleus.

How is wavelength of a moving object related to its mass?

• Larger objects have smaller wavelengths.

• Smaller objects have smaller wavelengths.

• Larger objects have larger wavelengths.

• Smaller objects have larger wavelengths.

Tags

NGSS.HS-PS4-1