University:
Missouri State University
Course:
CHM 160 | General Chemistry I
Academic year:

2023
Views:

369

Pages:

12
Author:

Andreas Barnett

1. Quantum Mechanics and Atomic Orbitals 2. Chapter 6 test - Tuesday HW: Quest: Chapter 6 Page 251, #40. Consider a transition of the electron in the hydrogen atom from n = 4 to n = 9. (a) Is AE for this process positive or negative? (b) Determine the wavelength of light that is associated with this transition. Will light be absorbed or emitted? (c) In which portion of the electromagnetic spectrum is the 1 in part (b)? 6.74 Element (a) N (b) Si (c) Cl Electron Configuration [He]2s 2p [Ne]3s 3p [Ne]3s 3p' Core electrons 2 10 10 Valence electrons 5 4 7 Unpaired electrons 3 2 1 6.76 (a) Mg: [Ne3s, 0 unpaired electrons (b) Ge: [Ar]4s 3d "4p", 2 unpaired electrons (c) Br: [Ar]4s 3d "4p", 1 unpaired electron (d) V: [Ar]4s 3d, 3 unpaired electrons (e) Y: [Kr]5s 4d, I unpaired electron (f) Lu: [Xe]6s 4f "5d', 1 unpaired electron 6.78 (a) 7A (halogens), 1 unpaired electron (b) 48, 2 unpaired electrons (c) 3A (row 4 and below), 1 unpaired electron (d) the f-block elements Sm and Pu, 6 unpaired electrons 40. (a) "n" increases (4 to 9), So AE is positive. TO (b) ΔΕ= -2.18×10-18) (+)=1.09×10」 E=hv; E=hc; X=h.c C ) > λ E λ= (6.63×10MJ.5) (3.0×108s) = 1.82x10"m -34 S (1.09×10J) (C) light is infrared.