4. The n-electron system in benzene may be approximated as a particle-on-a-ring with a radius of r, which is also the length of the C-C bonds in the ring. This bond length is approximately 1.39 A. The energy levels for the p-o-a-r are given by: n'h E, 2mr" where n 0, t1, t2, ±3, .. The six r-electrons in benzene fill the (singly degenerate) n 0 level, and the (doubly degenerate) nt1 level. The first excited state, then corresponds to exciting an electron from n=1 to n=2. a) Using the given bond length, calculate the energy change for the benzene molecule as an electron is excited from n 1 to n=2. b) Calculate the wavelength of light that benzene would need to absorb to undergo that energy change. Compare that with the experimental value of 268 nm. c) In what portion of the electromagnetic spectrum is this wavelength?

enow.com/ilrn/takeAssignment/takeCovalent Activity.do?locator-assignment-take t of pt 1 pt 1 pt t 1 pt Radiation in the ultraviolet region of the electromagnetic spectrum is quite energetic. It is this radiation that causes dyes to fade and your skin to develop a sunburn. If you are bombarded with 1.00 mol of photons with a wavelength of 355 nm, what amount of energy, in kilojoules per mole of photons, are you being subjected to? Energy = kJ/mol 1 pt 1 pt 1 pt 1 pt gnment Submit Answer Try Another Version [References] 10 item attempts remaining Cengage Learning Cengage Technical Support New iCloud Terms and Condition To use iCloud on this Mac you mus the new Terms and Conditions. MacBook Pro Previous Next> Save and Exit

The photoelectron spectra of elements X and Y are shown below. What is the most likely chemical formula of the compound made from these elements? X 42.7 2.90 390 34.0 4.65 0,59 100 10 1 lonization Energy (MJ/mol) Y 67.2 1.68 3.88 100 10 lonization Energy (MJ/mol) O XY2 O XY ) X3Y2 O XY3 Number of Electrons Number of Electrons

This question has multiple parts. Work all the parts to get the most points. a Consider the following electron configuration: (035)?(03s")?(03p)?(n3p)“(n3p*)4 Which species, in theory, would have this electron configuration? O F2 b Consider the following electron configuration: (03)?(035")?(03p)?(n3p)*(n3p*)* Which species, in theory, would have this electron configuration? OCI- Cl2

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okmarks Profiles Tab Window Help q keAssignment/takeCovalent q q Paraphras x q Quiz 2 (1).pdf Grammarly X My Home X Activity.do?locator assignment-take H2A Li Be Na Mg 38 48 58 68 7888 K Ca Sc A 3A 4A 5A 6A 7A He BCN O F Ne 18 28 Al Si P S Cl Ar Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Rc Rf Ha Cs Ba La OWLv2 10 X SEP 18 tv Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Arrange the following elements in order of increasing electronegativity: carbon, germanium, silicon, tin OWLv210 X Please answer this question according to the general rules you have learned regarding periodic trends. DO NOT base your answer on tabulated values since exceptions may occur. smallest largest W- Math122 Quiz 2....docx A DZL Homepage X + 0 Quiz 2.docx Previous Next = Show All W X V ⠀ P

Give the ground-state electron configu rations of (a) H2 - . (b) Li2, (c) Be2, (d) C2, (e) N2, and (f) O2 .