CHEM103 Lecture Notes - Lecture 5: Electron Configuration, Effective Nuclear Charge, Problem Set

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orangeturtle356

18 Sep 2018

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University of Alberta

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Chemistry

Course

CHEM103

Professor

Saliu,Kuburat

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CHEM103 Lecture Notes - Lecture 4: Quantum Mechanics, Electron Density, Angular Momentum

CHEM103 Lecture Notes - Lecture 5: Electron Configuration, Effective Nuclear Charge, Problem Set

CHEM 103 Lecture Notes - Fall 2018 Lecture 6 - Periodic trends, Diamagnetism, Nonmetal

Document Summary

Chem 103 lecture 5 shape of orbitals and their energies//electrostatic effects and splitting of energy levels. The case if hydrogen atom considered thus far is representative of one electron atoms, (solution obtained directly from the schr dinger equation). However, for marry-electron species, the presence of electron-electron repulsions causes the energy of the orbitals to vary in a complicated way. To account for these additional interactions, we need to consider 3 additional features: electron-spin quantum number, ms, maximum number of electrons an orbital can take, splitting of energy levels into sub-levels. An e- has magnetic properties ms = - (cid:2869)(cid:2870) (or spin down (counter clockwise)), (cid:2869)(cid:2870) (or spin up (clockwise)) Electrons with the same spin parallel spin. Electrons with different spin opposite spin http://boomeria. org/chemtextbook/cch9. html. No two electrons in an atom can have the same four quantum numbers. H = 1p 1e- n=1 l=0 ml = 0 ms = +1/2 or -1/2 n=1, l = 0, ml = 0, ms = +1/2.

Related Questions

Are these correct? And how do you do #5 and #6?

provided to determine AH rxn for the following reaction: urf (klimol) CH4(g) + 3 Cl2(g) â CHCI3() + 3 HCI(g) airrxn-? A)-151 kJ B)33SkJ C) +662kJ D) +117kJ E)-217 kJ A) 4.1 atm B) 5.0 atm c) 6.4 atm D)1.1 atm E) 2.3 atm kg) of the copper sample if the specific heat capacity of copper is 0 CH4(g) 75 CHCI3() -134 HCI(g) -92 8) What pressure will 14.0 g of CO exert in a 3.5 L container at 75 C? 9) A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 50.0Â°C, determine the mass (in .385 J/g C A) 226 kg B) 0.235 kg C)6.64 kg D) 119kg E)5.10 kg 10) Which of the following processes is exothermic? A) the ionization of a melting snow atom B) the breaking of a boiling of water bond C) the boiling of water D) the condensation of water E) All of the above processes are exothermic 11) Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm. B)4.27 x 10-19J C) 2.34 x 10-19J D)6.45 x 10-19J E) 2.83 x 10-19J A)3.54 Ã 10-19J 12) Identify the color of a flame test for potassium D) yellow A) violet B) red C) white E) blue 13) Which of the following statements is TRUE? A) The emission spectrum of a particular element is always the same and can be used to identify the element. B) Part of the Bohr model proposed that electrons in the hydrogen atom are located in "stationary states" or particular orbits around the nucleus. C) The uncertainty principle states that we can never know both the exact location and speed of an electron. D) An orbital is the volume in which we are most likely to find an electron. E) All of the above are true. 14) Calculate the wavelength of an electron (m-9.11 x 10-28 g) moving at 3.66 Ã 106 m/s. A)1.99 x 10-10m B)5.03 x 10-10 m C) 1.81Ã10-10 m D)5.52 Ã 10-9 m E) 2.76 Ã 10-9 m 15) Which of the following quantum numbers describes the shape of an orbital? A) principal quantum number B) magnetic quantum number C) spin quantum number D) SchrÃ¶dinger quantum number E) angular momentum quantum number 16) Determine the energy change associated with the transition from n = 2 to n-5 in the hydrogen atom. A)-218Ã10-19J B)+654 Ã 10-19 J C) +4.58 x 10-19 J D)-1.53 x 10-19 J E) +3.76 Ã 10-19J 17) If two electrons in the same atom have the same value of I, they are A) in the same sublevel, but not necessarily in the same level. me level, but different sublevel. C) in the same orbital. D) in different levels and in different shaped orbitals. E) none of the above.

CHEM103 Lecture Notes - Lecture 5: Electron Configuration, Effective Nuclear Charge, Problem Set

CHEM103 Lecture Notes - Lecture 4: Quantum Mechanics, Electron Density, Angular Momentum

CHEM103 Lecture Notes - Lecture 5: Electron Configuration, Effective Nuclear Charge, Problem Set

CHEM 103 Lecture Notes - Fall 2018 Lecture 6 - Periodic trends, Diamagnetism, Nonmetal

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