Multiple Choice
What did de Broglie propose to account for the fixed energy levels in Bohr's model of the atom?
9. Quantum Mechanics
De Broglie Wavelength
Back9. Quantum Mechanics
De Broglie Wavelength
- Multiple ChoiceAt what speed must an electron travel for its de Broglie wavelength to be 1.0 nm?
- Multiple ChoiceWhat is the De Broglie wavelength for a 3 g marble rolling at a speed of 30 cm/s?1views
- Multiple ChoiceA typical electron velocity is 7.27 x 10^6 m/s. Calculate the de Broglie wavelength of an electron having this velocity:
- Multiple ChoiceWhich of the following best describes Louis de Broglie's central idea about the nature of electrons in atoms?
- Multiple ChoiceIf an electron has a de Broglie wavelength of 0.250 nm, what is its momentum?
- Multiple ChoiceCalculate the de Broglie wavelength of a hydrogen atom traveling at 495 m/s. Assume the mass of a hydrogen atom is approximately 1.67 x 10^-27 kg.
- Multiple Choice
Consider an atom traveling at 3.00 x 1015 m/s. The de Broglie wavelength is found to be 7.1316 x 10-39. Determine the mass (in g) of the atom.
6views - Multiple ChoiceWhat is the de Broglie wavelength of an electron traveling at 1.12 x 10^5 m/s, given that the mass of an electron is 9.11 x 10^-31 kg?1views
- Multiple ChoiceCalculate the energy of a neutron whose de Broglie wavelength is 0.7 Å. Assume the mass of the neutron is 1.675 x 10^-27 kg and use Planck's constant h = 6.626 x 10^-34 J·s.
- Multiple ChoiceThe mass of an electron is 9.11 x 10^-31 kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31 x 10^-10 m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00 x 10^8 m/s.
- Multiple ChoiceCalculate the de Broglie wavelength of a 143 g baseball traveling at 83 mph. (Note: 1 mph = 0.44704 m/s)
- Multiple Choice
The faster an electron is moving, the _________ its kinetic energy, and the __________ its wavelength.
3views - Multiple ChoiceConsider an atom traveling at 1% of the speed of light. The de Broglie wavelength of the atom is found to be 3.32 × 10⁻³ pm. Which element is this?
- Multiple ChoiceCalculate the de Broglie wavelength of an electron traveling with a speed of 3.21 × 10^5 m/s. Assume the mass of an electron is 9.11 × 10^-31 kg.