Question

1. Thinking about electrons and photons, what is emission? A. An electron interacting with a photon to reach a higher energy level B. An electron releasing a photon to reach a lower energy level C. A photon releasing an electron to reach a lower energy level 2. Rank the following in INCREASING wavelength (smallest to largest): green light, infrared, micro waves, X-ray A. green light, micro waves, infrared, X-ray B. micro waves, infrared, green light, X-ray C. X-ray, green light, infrared, micro waves 3. What is the frequency of a photon with a wavelength of 750 nm? A. 4.0 E 14 Hz B. 2.65 E -19 Hz C. 4.0 E 5J

Answer 1

0 ③ An electron releasing a photon to reach a lower - energy level . Note: Photon is a packet of energy ; wwn electoon jumps to a lower evergy level ; it release energy (pretont. 2 © x -ray - green - light < intared <microwaves Frequency ; O== Now 12750 mm = 750 810-9m : 0= 3x108 ms NOH; H2=57 750x1o-am ? 4.0 E 14H2 Lophon A) ②

@ Rm ( ma ingz] = 1:097x107 mix [ jāve] I= 8.23x 106 mol 7= 1.22x10-7m Now E=hc = 683x10-30 JS X3x108 ms 1.22x107m = 1.6E 1018 J lobture) ② ② n=2; 1= 2; me = o ; mg = 1 (not allowed) Note: I can't be greater than (n-1) So here I should be (2-1) = 1 6 n=3 ; 1= 1 = p-orbited and p orbital occupig Geltreng (B)