W7D3 Wed: TEST 4

Which color of visible light has photons with the highest energy?

• Red

• Green

• Violet

• Blue

 Photon X has a frequency that is twice the frequency of Photon Z.

Which photon (X or Z) has the longest wavelength?

• X

• Z

• Z = X

• X^Z

If the frequency of a red spectrum line is at 1.60 x 1014 Hz, how much energy (E) does each photon of this light have? (HINT: use the formula E = hf)

h = 6.626 x 10^-34

• Each photon of this red light has an energy of approximately 6.626 × 10⁻¹⁹ joules.

• Each photon of this red light has an energy of approximately 1.06 × 10¹⁹ joules.

• Each photon of this red light has an energy of approximately 1.06 × 10⁻¹⁹ joules.

Which travels at a greater frequency, ultraviolet light or infrared light?

• ultraviolet

• infared

• Neither, they both travel at the same speed.

What happens to an electron when energy is added?

• It gets excited and moves up an energy level.

• It gets excited and moves down an energy level.

• It stays at the same energy level.

• It stays at the same energy level, but loses a neutron.

 Photon X has a frequency that is twice the frequency of Photon Z.

Which photon (X or Z) has the highest energy?

• X

• Z

• Z = X

• X^Z

When an electron emits light

• the electron gets "excited" and "jumps out" away from the nucleus

• the electron gets "excited" and "drops back down" closer to the nucleus

• the electron "calms down" and "jumps out" away from the nucleus

• the electron "calms down" and "drops back down" closer to the nucleus

Which of the following best describes what happens when an electron absorbs a photon?

• The electron becomes a proton.

• The electron loses energy and emits light.

• The electron moves to a lower energy level.

• The electron moves to a higher energy level.

What is released when an electron loses energy?

• a photon

• a proton

• a neutron

• an alpha particle

What must happen for an electron to move from a higher energy level to a lower one?

• It must lose a proton.

• It must emit a photon.

• It must absorb a photon.

• It must gain a neutron.