Question

1. The 1-1 bond of iodine (12) can be broken (creating two separate I atoms) with electromagnetic radiation. What is the longest wavelength (lowest energy) photon which has sufficient energy to break the 1-1 bond if the energy of the bond is 151 kJ mol'? (show all work, 4 pts) b) Would a photon of this wavelength be best characterized as X-ray, microwave, or infrared electromagnetic radiation? (1 pt) 2. Consider a green laser that emits photons at 532 nm. If in 1.0 minute the laser emits 8.09 X 101 photons, what is the power output of the laser in mW? (show all work, 5 pts) 3. Write out complete electron configurations for the atomic species below. Show all core electrons for a), noble gas short hand notation can be used for b) and c) (3 pts): a) AI b) Cr c) Ass+

Answer 1

1.

for 1 I₂ molecule energy required to break bond = 151000J/(6.022x10²³)

2.51 x 10^-19 J

energy = hc/λ

h = Planck constant

λ = wavelength

c = speed of light

λ = hc/energy = 6.626 x 10^-34 x 3 x 10⁸ / 2.51 x 10^-19 J = 7.92 x 10^-7m = 792 nm

b) No x ray lies from 0.01 nm to 10 nm