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Exam 3 Questions with Solutions - Introduction to Chemical Principles | CHEM 40, Exams of Chemistry

Material Type: Exam; Professor: Pauly; Class: Intro to Chemical Principles; Subject: Chemistry; University: City College of San Francisco; Term: Spring 2009;

Typology: Exams

Pre 2010

Uploaded on 08/16/2009

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koofers-user-j62-1 🇺🇸

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Download Exam 3 Questions with Solutions - Introduction to Chemical Principles | CHEM 40 and more Exams Chemistry in PDF only on Docsity! t ' / - r ' r - Yxavr.5 k-t<k\ /whrt< Short Answer Fill in the blank(s) with the best possible word, expression or number. L l_L -!e -!L 1 3> 2p zt 3_ cl.er,.^ {o 11. Give the complete ground-state electron configuration (with no abbreviation) ofthe following elements. [6 points] u) poturrir l* 7s2- 2?t" 3s2' ?/" 4sl b) "opp", I s- ZsLZ?t" 3*??'" Llst SJto 12. Draw an orbital diagram for ground-state silicon in the space below. You may use boxes or lines to depict the orbitals. [4 points] 9i l\e- 4t 41 t^ 4u l> - 13. Consider the electron in a hydleg@ atom. Identify the following statemerts as TRUE or FALSE. [4 points] @ls' a) n = 4 is the first available xcited 6tate, an4! b) wher the electron moves from n = 1 to n = 3, energy isabsorbed. <- t -^ t lU( c) The level where n = l0 is closest 10 the nucleus. Ti'rre d) When hydrogen is in the ground state, its electron is in r = l. I 0, . . 1 e; halogens b) sbFs c) SeO3 -,,-\., ,'2'i 14. Provide the number of valence electrons for each of the following atom or ions, [5 points] a - a) alkaline earth metals _1_ L c)c ,l I Nl+ 15. For the formula below, draw ONE valid l-ewis dot structure clearly showing ALL elechons and then complete the tables on the right. [15 points] a) Hot Total number of valence I +^- electrons: l l< Is there another Vto resonance structure? Is there anonpola/tfri) Vc5 present inthe stuctu'rE.y' ; ,^ If so. which one? ()- " Total number of valence ,, ^ -electrons; +o L Is tierg another n <) resonance structure? Is there a nonpola{bond rt/ \plesent ln me suuctureT I t - so, which one? . . . ' r -, r ' t - . \ / sb '- ,/ I \F" ( ' | " l 'h . . - \ \ \e I :o i 4 Total number of valencE nt , ^- eleclrons: ,< | - Is there another resonance stlucfure? Y<s Is one Se--O bond in !,1O Seq longer than the other? If so, which one? reJ or'\ nce
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