Exam 3 Summary Session Key

CHEM 105 11/14/2023 Exam 3 Summary Session Reminder: Summary session sheets should not be your only preparation method for the exam. We do not see the exams or write them, so this sheet should be a supplement to any review you complete. Multiple Choice 1. Which pair of electron configurations represent atoms with the most similar chemical properties? a. 1s 2 2s 2 2p 6 3s 2 3p 5 and 1s 2 2s 2 2p 6 3s 2 3p 4 b. 1s 2 2s 2 and 1s 2 2s 2 2p 2 c. 1s 2 2s 2 2p 6 3s 2 3p 5 and 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 5 d. 1s 2 2s 2 2p 6 and 1s 2 2s 2 2p 4 2. What is the wavelength of light with a frequency of 6.59 x 10 5 s -1 ? a. 2.0 x 10 -25 m b. 2.0 x 10 14 m c. 2.2 x 10 -3 m d. 455 m 3. Which of the following are diamagnetic? I. Sulfur II. Magnesium III. Zinc IV. Argon

a. I and II b. II, III, and IV c. I, II, and III d. IV only 4. Rank S, O, and Al in order of increasing electronegativity. a. O< S< Al b. Al<S< O c. O<Al<S d. S<O<Al 5. How many possible electrons can be placed in the n=4 energy level? a. 12 b. 16 c. 32 d. 24 6. Which of the following is true regarding electron affinity? a. Electron affinity and electronegativity measure the same value b. Electron affinity increases across a row due to electron shielding c. Electron affinity is always positive d. All of the above are false 7. How many radial nodes would a 6f orbital have? a. 2 b. 3 c. 4 d. 5 Total nodes= n-1 = 5 Angular nodes = ℓ = f = 3

Radial nodes= total - angular = 2 8. List the following atoms in order of increasing ionization energy: Li, Na, C, O, F. a. Li < Na < C < O < F b. Na < Li < C < O < F c. F < O < C < Li < Na d. Na < Li < F < O < C e. Na < Li < C < F < O 9. The following reaction occurs: BrO 3 1- (aq) + 5 Br 1- (aq) + 6 H + → 3 Br 2 (g) + 3H 2 O (l). If water is formed at 0.36 M/s, what is the rate of disappearance of Br 1- ? a. 1.2 M/s b. 0.72 M/s c. -0.60 M/s d. -0.36 M/s 10. Calculate the Lattice Energy from the following Energy Diagram a. -36 kj/mol b. -786 kj/mol c. -1141 kj/mol d. -1496 kj/mol Lattice Energy