Exam_3_review%20questions_KEY

Exam_3_review%20questions_KEY - Chem 102A 01 Fall 2008 Exam...

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Chem 102A – 01 – Fall 2008 Exam 3 - Suggested Review Questions Chapter 8.5 and onward: (1) Which of the following ions is NOT paramagnetic? Electron configuration contains paired electrons a) C 2 s 2 2 p 2 b) B 2 s 2 2 p 1 c) N 2 s 2 2 p 3 d) O 2 s 2 2 p 4 e) Mg 3 s 2 (2) Which of the following ions is NOT diamagnetic? Electron configuration contains unpaired electrons a) Rb 5 s 1 b) Sr 5 s 2 c) Kr 4s 2 4 p 6 d) Be 2 s 2 e) Ne 2s 2 2 p 6 (3) For which of the following processes is the first ionization energy? Energy requires to remove a single electron from a neutral gaseous atom a) X( g ) + e X ( g ) electron affinity b) X( s ) X + ( s ) + e solid phase c) X( g ) X + ( g ) + e d) X + ( g ) X 2+ ( g ) + e second ionization energy e) None of the above (4) Which of the following has the highest first ionization energy? Increasing across a row, except Be > B, N > O a) Be b) B c) C d) N half-filled p subshell - stable e) O (5) Generally, there is a decrease in atomic size as one moves a) down a group. b) up a group. Principal quantum number ( n ) decreases c) from left to right across a period. Effective nuclear charge ( Z eff ) increases d) from right to left across a period. e) both b) and c) (6) Which of the following atoms or ions is the largest? a) Li + smaller n b) Na + smaller n c) K + isolectronic cation (18 e - /19 protons) d) Ar isolectronic neutral (18 e - /18 protons) e) Cl isolectronic anion (18 e - /17 protons) (7) The first ionization energy for K is 419 kJ/mol. The electron affinity for Br is 325 kJ/mol. Then Δ E for the reaction, K( g ) + Br( g ) K + ( g ) + Br ( g ) is: a) 94 kJ/mol b) +94 kJ/mol Δ E = IE 1 + EA = 419 + ( 325) c) 744 kJ/mol d) +744 kJ/mol
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Chem102A-01 Exam 3 – suggested review questions e) None of these (8) In which of the following diatomic molecules/ions, the two atoms form a triple bond? a) N 2 b) CO c) CN d) all of these e) none of these (9) When carbon bonds to oxygen, the bond is ________ and ________ atom bears a partial negative charge. a) nonpolar, neither b) polar, the carbon c) polar, the oxygen (oxygen is more electronegative) d) none of these (10) Which of the following should have a dipole moment?
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This note was uploaded on 01/10/2010 for the course THTR 100 taught by Professor Muller during the Spring '09 term at Vanderbilt.

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Exam_3_review%20questions_KEY - Chem 102A 01 Fall 2008 Exam...

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