4-2 Quantum Theory

Multiple Choice

What is the significance of the photoelectric effect in quantum theory?

• It supports the wave theory of light

• It supports the particle theory of light

• It disproves the wave theory of light

• It disproves the particle theory of light

Multiple Choice

What did Niels Bohr revolutionize in our understanding of atomic structure?

• Chemical bonding

• Atomic structure

• Nuclear physics

• Quantum mechanics

Multiple Choice

What is the difference between quantized energy levels and continuous energy levels?

• Quantized energy levels have specific values, while continuous energy levels do not.

• Quantized energy levels can be any value, while continuous energy levels are restricted.

• Quantized energy levels are only theoretical, while continuous energy levels are practical.

• There is no difference; both terms mean the same thing.

Multiple Choice

Which of the transitions below for a hydrogen

atom involves the least energy?

• 𝑛= 5 𝑡𝑜 𝑛 = 3

• 𝑛 = 5 𝑡𝑜 𝑛 = 4

• 𝑛 = 2 𝑡𝑜 𝑛 = 5

• 𝑛I= 4 𝑡𝑜 𝑛 = 7

Multiple Choice

What happens to an electron during absorption and emission?

• Absorption: electron drops to lower energy state

• Emission: electron moves to higher energy state

• Absorption: electron moves to higher energy state

• Emission: electron drops to lower energy state

Multiple Choice

Which electron transition between the energy

levels of hydrogen causes the emission of a photon of

visible light?

• 𝑛 = 6 to 𝑛 = 5

• 𝑛 = 5 to 𝑛 = 6

• 𝑛 = 5 to 𝑛 = 2

• 𝑛 = 2 to 𝑛 = 5

Multiple Choice

What does the wave-particle duality of electrons explain?

• The behavior of light

• The stability of electron orbits

• The mass of electrons

• The charge of electrons

Multiple Choice

What does Heisenberg's Uncertainty Principle state about the position and momentum of particles?

• They can be known exactly at the same time

• They cannot be known simultaneously

• They can be measured with high precision

• They are always uncertain

Multiple Choice

What does the Schrödinger Wave Equation describe?

• Electron behavior as particles

• Electron behavior as wave functions

• Electron behavior as solid objects

• Electron behavior as light

Multiple Select

What are some applications of atomic emission spectra?

• Spectroscopy

• Quantum computing

• Laser technology

• Chemical bonding theory