Chem 1211 Practice Exam 1 PDF

Practice Exam 1 Chem 1211 Practice Exam 1 Chem 1211 Multiple Choice Section: For each of the following, circle the answer that corresponds to the one, best answer. (4 points each) 1. Which of the equations shown below is correct? a....

Practice Exam 1 Chem 1211 Practice Exam 1 Chem 1211 Multiple Choice Section: For each of the following, circle the answer that corresponds to the one, best answer. (4 points each) 1. Which of the equations shown below is correct? a. 1 g = 1 × 10-9 ng b. 1 g = 1 ng c. 1 µg = 1 × 10-12 ng d. 1 ng = 1 × 10-12 g e. 1 ng = 1 × 10-9 g 2. If 3.64 mg is converted to kg, the result is… a. 3.64 x 109 kg b. 3.64 x 10-6 kg c. 3.64 x 10-3 kg d. 3.64 x 103 kg e. 3.64 x 106 kg 3. Adults need about 15 µg of Co (Z = 27) each day. Given that the density of Co is 8.90 g/mL, how many mL of Co does an adult require? a. 1.7 × 10-6 mL b. 1.7 mL c. 1.7 × 10-3 mL d. 0.13 mL e. 1.3 × 10-4 mL 4. Which of the following statements is not true? 95 a. Mo contains 53 neutrons. 42 51 b. V has an atomic number of 23. 23 12 c. C has the same number of protons, neutrons and electrons. 6 66 d. Zn has the same number of electrons and protons. 30 56 e. Fe has the same number of neutrons and protons. 26 Practice Exam 1 Chem 1211 5. Which of the following are isotopes of each other? PROTONS NEUTRONS ELECTRONS A 23 24 23 B 24 23 23 C 25 27 25 D 23 27 23 E 24 23 24 a. A and B b. D and E c. A and D d. B and E e. None of the above 6. Which one of these spectral lines has the highest energy? a. Not enough information given b. The red line (675 nm) c. The violet line (450 nm) d. The green line (600 nm) e. The yellow line (650 nm) 7. A photon with an energy of 6.63 x 10-16 J would have a frequency of a. 4.39 x 10-49 Hz b. 3.00 x 1026 nm c. 1.00 x 1018 Hz d. 1.00 x 10-18 Hz e. 3.00 x 10-10 nm 8. Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm. a. 3.54 × 10-19 J b. 4.27 × 10-19 J c. 2.34 × 10-19 J d. 6.45 × 10-19 J e. 2.83 × 10-19 J Practice Exam 1 Chem 1211 9. What is the correct electron configuration for an atom of Sn? a. [Ne] 3s23p5 b. [Ar] 3d54s2 c. [Xe] 4f16s2 d. [Kr] 4d105s25p2 e. [Ar] 3d104s24p6 10. A given element will produce a distinct line emission spectrum in an atomic discharge tube experiment because every atom of that element has… a. A fixed set of energy levels. b. A fixed number of electrons. c. A fixed number of valence electrons. d. A fixed number of protons. e. A fixed atomic size. 11. Which of the following represents a p orbital? I II III IV a. I b. II c. III d. IV e. II and IV 12. Which element forms a 1+ cation that has the same electron configuration as neon? a. Na b. F c. K d. Cl e. Li Practice Exam 1 Chem 1211 13. Which of the following is isoelectronic with Ne? a. Cl1- b. Ca2+ c. K1+ d. Mg2+ e. O 14. An atom of the element phosphorus, P, has how many valence electrons? a. 3 b. 6 c. 8 d. 5 e. 4 15. What is the element with a half-filled valence shell of electrons that requires only one more electron to completely fill that valence shell of electrons? a. C b. Fe c. H d. He e. Li 16. In building the electron configuration of scandium, the last electron goes into which kind of orbital? a. g b. s c. p d. d e. f Practice Exam 1 Chem 1211 17. How many electrons are in the d-orbitals of a cobalt atom? a. 4 b. 7 c. 9 d. 27 e. 56 18. Which one of the following ground state atoms is NOT paramagnetic? a. Ge b. K c. Ga d. Ca e. As 19. Which one of the following ions or atoms has the largest radius? a. Si4- b. P3- c. S2- d. Cl1- e. Ar 20. Which of the following atoms has the highest electron affinity? a. Cs b. Fe c. I d. F e. Na Practice Exam 1 Chem 1211 Workout Problems Section: For full credit, all work must be shown in the space provided 1. 5 Points Use dimensional analysis to convert 60.0 miles per hour to nm per second. You must show your work and report your answer using the correct number of significant figures to receive full credit. You must also use the following unit conversions somewhere in your calculation: 5280 ft = 1 mile. 60 min = 1 hr. 2.54 cm = 1 in. 60 s = 1 min. 12 in = 1 ft 2. 5 Points Perform the following calculations and report your answer using the correct number of significant figures. A) [((5.43 + 8.79 + 2.1) / 4.0)] x 6.24 = B) 99.0 + 2(5.56) =  Practice Exam 1 Chem 1211 3. 5 Points Complete the following table (all empty cells): Number Number Number Nuclide Atomic Mass of of of Charge Symbol Number Number Protons Neutrons Electrons 𝟓𝟏 𝟓" 𝟐𝟑𝑽 4. 5 Points Use the periodic table to give the name for each of the following elements: (a) the halogen in the same period as oxygen (b) the noble gas in the same period as oxygen (c) the alkali metal with the largest atomic radius