Question

Which statement(s) is/are true regarding the emission of a photon from a hydrogen atom? a. The emission of photons is an endothermic process, so ∆E is positive. b. The emission of photons is an exothermic process, so ∆E is negative. c. The wavelength of the ni = 3 to nf = 2 transition is shorter than the ni = 4 to nf = 2 transition. d. The energy of the ni = 3 to nf = 2 transition is greater than the ni = 4 to nf = 2 transition.

Answer 1

a. The emission of photons is an endothermic process, so ∆E is positive. FALSE, since emission of photon is a decrease in th elevel of energy, therefore, energy goes out

b. The emission of photons is an exothermic process, so ∆E is negative. TRUE, when a photon is emmited, we have also energy

c. The wavelength of the ni = 3 to nf = 2 transition is shorter than the ni = 4 to nf = 2 transition. FALSE, the energy is higher in the 4-->2, therefore has a higher wavleneght

d. The energy of the ni = 3 to nf = 2 transition is greater than the ni = 4 to nf = 2 transition. FALSE, since droping 2 levels has a higher energy than dropping only 1 level