Question

1. How many different energies of light are emitted from an H atom with the electron in the n=4 energy shell?

Group of answer choices

a. 3

b. 4

c. 5

d. 6

2.. Would a photon of visible light (photons with wavelengths = 400 - 700 nm) have sufficient energy to excite an electron in a hydrogen atom from n = 1 to n = 5?

NOTE: You'll need to calculate how much energy is required for the transition from n = 1 to n = 5. Then convert that energy to wavelength!

Group of answer choices

a. Yes! the electron would need to absorb a photon with a wavelength equal to 93 nm to excite it from n=1 to n=5. Visible light does have sufficient energy.

b. No! the electron would need to absorb a photon with a wavelength equal to 410 nm to excite it from n=1 to n=5. Visible light does not have sufficient energy.

c. Yes! the electron would need to absorb a photon with a wavelength equal to 410 nm to excite it from n=1 to n=5. Visible light has sufficient energy.

d. No! the electron would need to absorb a photon with a wavelength equal to 93 nm to excite it from n=1 to n=5. Visible light does not have sufficient energy.

3.. Some streets lamps emit only yellow light. At night when illuminated by a street light-emitting yellow light, what color does a blue car appear?

Note: Green is not the right answer

a. black

  b. blue

  c. green

  d. colorless

Answer 1

3. At night when illuminated by a street light-emitting yellow light, a blue car appears as black as it neither absorbs nor emits yellow colour. So, the answer is (a)