A 10 b 15 c 8 d 0 e 12 3 pts 12 which of the

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(A) 10 (B) 15 (C) 8 (D) 0 (E) 12 (3 pts) 12. Which of the following sets of quantum numbers could describe an electron in the arsenic atom’s highest occupied energy level? (A) n = 3, l = 1, m l = 0, m s = +½ (B) n = 4, l = 2, m l = 1, m s = –½ (C) n = 4, l = 1, m l = 0, m s = –½ (D) n = 3, l = 2, m l = 0, m s = 0 (E) n = 4, l = 2, m l = 1, m s = –1 (E) (B) (D) (A) (C)
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A4 © 2018 L.S. Brown (3 pts) 13. Which atom or ion should have the smallest radius? (A) Ca 2+ (B) Cl (C) Ga (D) Ca (E) Ar (3 pts) 14. Which atom or ion should have the largest ionization energy? (A) F (B) S (C) P (D) Mg 2+ (E) O 2– (3 pts) 15. Of the 5 ions or atoms listed above in #14, how many are paramagnetic in their ground state electron configurations? (A) 4 (B) 3 (C) 2 (D) 1 (E) 0 (3 pts) 16. Which of the following chemical bonds would be the most polar? (A) F—F (B) C—F (C) H—F (D) S—F (E) N—F (3 pts) 17. A neutral atom in its ground state has the following electron configuration: [Ar] 4 s 2 , 3 d 10 , 4 p 2 . What element is it? (A) Te (B) Ge (C) Se (D) As (E) Sn (3 pts) 18. A neutral atom in an excited state has the following electron configuration: 1 s 2 , 2 s 2 , 2 p 6 , 3 s 2 , 3 p 3 , 4 s 1 . What element is it? (A) K (B) S (C) P (D) Ar (E) O (3 pts) 19. An ion with a 3+ charge has the following electron configuration: 1 s 2 , 2 s 2 , 2 p 6 . What element is it? (A) C (B) Sc (C) Ne (D) Mg (E) Al
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NAME:_________________________________ © 2018 L.S. Brown A5 (4 pts) 20. The figure below shows the photoelectron spectrum for sulfur, plotted like the spectra we looked at in class. The numbers give the binding energies for the different peaks. How much energy is required to remove an electron from the 2s subshell of a sulfur atom? (A) 239 MJ/mol (B) 22.7 MJ/mol (C) 16.5 MJ/mol (D) 2.05 MJ/mol (E) 1.00 MJ/mol (5 pts) 21. The graph below shows the first three ionization energies for sodium, magnesium, and aluminum. (The X, Y, and Z labels are used below to identify the different lines.) Which of the following choices correctly matches the three data sets in the graph to the three elements? (A) X = Na, Y = Mg, Z = Al (B) X = Al, Y = Mg, Z = Na (C) X = Na, Y = Al, Z = Mg (D) X = Al, Y = Na, Z = Mg (E) X = Mg, Y = Na, Z = Al 0 2000 4000 6000 8000 1 2 3 Ionization energy (kJ/mol) Number of electrons removed X Y Z
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A6 © 2018 L.S. Brown (6 pts) 22. A sealed bulb containing helium gas had a pressure of 345 torr at 10.0
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