11/15/22 - Atomic Spectra

Question 1

What is a line spectrum?

Answer 1

A series of lines of different colors representing photons of different wavelengths. Each element has its own emission spectrum.

Question 2

What does the Rydberg equation predict?

Answer 2

The position and wavelength of any line in a line spectrum.

Question 3

What is Planck’s constant (h)?

Answer 3

h = 6.626 x 10^-34 (m^2 x kg)/s

Question 4

What is the Rydberg equation?

Answer 4

1/λ = R[1/(n^2)1 - 1/(n^2)2]
R = 1.097 x 10^7 m^-1

Question 5

What is the work function (Φ)?

Answer 5

The energy an electron spends breaking away from metal during the photoelectric effect.

Question 6

How do you calculate the energy of a photon in the photoelectric effect?

Answer 6

E photon = Φ + (electron kinetic E)

Question 7

What are the ways to write the energy of a photon?

Answer 7

E photon = Φ + (electron kinetic E) = ∆E(atom) = hv = hc/λ

Question 8

What did the Bohr model explain?

Answer 8

Quantized emissions of light and the line spectra of hydrogen atoms.

Question 9

What is the equation for the difference in energy between two different levels?

Answer 9

∆E = (-2.18 x 10^-18 J)[1/(n^2)final - 1/(n^2)initial]