Light and the Quantum Model

What three things determines if electrons are ejected or not in the photoelectric effect? (choose 3)

• Intensity

• frequency

• wavelength

• type of metal

What is a quantum?

• A "particle" of energy

• A light wave

• A proton

• A neutron

Light and electrons have properties of....(select all that apply)

• Waves

• Particles

• neutrons

• protons

The line spectrum of hydrogen is caused by when electrons release energy by

• Moving to a lower energy level

• Moving to a higher energy level

• Moving to an excited state

• Absorbing energy

What happens when an electron moves from n=1 to n=2?

• Absorbs energy

• Releases energy

• nothing

• releases a photon

Which of these would have a higher energy change?

• n=4 to n=2

• n= 4 to n=1

What things does the Heisenberg Uncertainty Principle say that you CAN NOT know at the same time? (select all that apply)

• position

• momentum

• mass

• energy

Which of these only applies to the Bohr Model? (select all that apply)

• Described as an electron cloud

• Electrons are in orbitals

• Electrons behave like a particle

• Tried to determine the exact location of an electron

• Model was based on math equations

Which type of radiation has the smallest wavelength?

• x-ray

• visible light

• gamma rays

• ultraviolet light

Which of these has the lowest frequency?

• green light

• infrared light

• ultraviolet light

• microwaves