M T W R. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. (3 pts ea)

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1 Exam 1 A Fall 2016 a Seat # Name M T W R MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. (3 pts ea) 1) Which of the following is a chemical property? A) temperature B) mass C) flammability D) melting point E) volume 2) All of the following are examples of matter except A) air. B) water. C) plants. D) salt. E) heat. 3) Which of the following is a physical change? A) the baking of a potato B) the rusting of iron C) the condensation of water vapor D) the explosion of nitroglycerin 4) Which best describes the size and shape of a sample of gas? A) It has definite volume and definite shape. B) Its volume is determined by the container, but it has a definite shape. C) Volume and shape are both determined by the container. D) It has definite volume, but shape is determined by the container. E) Volume and shape cannot be described. 5) 1-butanethiol, one of the compounds giving skunks their distinctive odor, freezes at C and boils at 98.5 C. What is its phase at 37 C? A) a mixture of liquid and gas B) gas C) solid D) liquid E) a mixture of solid and liquid 6) Which of the following is a pure substance? A) root beer B) eggs C) neon D) hand lotion E) gasoline 7) Which of the following observations demonstrates that a solid sample is a compound? A) It cannot be broken down into simpler substances by chemical methods. B) Heating the substance causes no visible color change. C) Heating the substance causes it to melt, then to boil. D) It cannot be broken down into simpler substances by physical methods. E) Crushing the sample does not affect its other properties. 8) The formula for glucose, C6H12O6, represents a compound composed of A) six atoms of carbon and two atoms of water. B) six atoms of carbon, twelve atoms of hydrogen, and six atoms of oxygen. C) one atom of carbon, two atoms of hydrogen, and one atom of oxygen. D) six atoms of carbon, ten atoms of hydrogen, and four atoms of oxygen. E) six atoms of carbon and six atoms of water. A-1

2 9) Element Z has the following properties: a. noncombustible b. unreactive c. colorless, odorless gas at room temperature d. nonconductor of electricity Element Z can be classified as a and will be found the zigzag line of the periodic table. A) metalloid; along side of B) non-metal; to the right of C) non-metal; along side of D) metal; to the right of E) metal; to the left of 10) Which chemical symbol represents a metallic element? A) Ar B) P C) Br D) H E) Ca 11) Consider the chemical reaction described as mercury(ii) oxide heat mercury + oxygen. Identify the reactant(s) in this example. A) mercury(ii) oxide B) mercury C) oxygen D) mercury + oxygen E) heat 12) The abbreviation for the metric unit used to measure volume is A) g B) K C) g/cm3 D) L E) m 13) The measurement most likely to describe the amount of pain reliever in a headache tablet is A) 325 mg/ml. B) 1.5 kg. C) 500 mg. D) 1.00 ml. E) 0.25 L. 14) Which of the following measurements has three significant figures? A) g B) 1,207 g C) g D) g E) g 15) What is the numerical value of ? Express your answer using the correct number of significant figures. A) 1.47 B) C) 1.5 D) E) none of the above 16) How many significant figures should be retained in the result of the following calculation? ( ) ( ) A) 2 B) 3 C) 1 D) 4 A-2

3 17) Find the difference (subtracted value) between two masses measured as grams and grams. Express the answer to the correct number of significant figures. A) grams B) 7.63 grams C) 8 grams D) 8.0 grams E) 7.6 grams 18) Which choice best describes the degree of uncertainty in the measurement g? A) The uncertainty cannot be determined without additional information. B) The quantity is exact. C) The uncertainty is in the ones place. D) The uncertainty is in the tenths place. E) The uncertainty is in the hundredths place. 19) The number in conventional notation is: A) B) C) D) E) ) In scientific notation, the number 185,000,000 is A) 1.85x10-8 B) 1.85x108 C) 185x10-8 D) 1.85x106 E) 185x106 21) The smallest amount of an element that retains that element's characteristics is the A) atom. B) neutron. C) molecule. D) electron. E) proton. 22) Which characteristics correctly describe a neutron? A) approximate mass amu; charge -1; outside nucleus B) approximate mass 1 amu; charge +1; inside nucleus C) approximate mass 1 amu; charge 0; inside nucleus D) approximate mass amu; charge +1; inside nucleus E) approximate mass 1 amu; charge 0; outside nucleus 23) In a neutral atom the number of is equal to the number of. A) protons, electrons B) neutrons, electrons C) protons, neutrons D) protons + electrons, neutrons E) none of the above 24) The symbol of the element with 23 protons is A) B. B) Mg. C) Na. D) V. E) Cr 25) An atom with Z = 26 and A = 58 contains protons and neutrons. A) 32; 26 B) 26; 84 C) 58; 26 D) 26; 58 E) 26; 32 26) Adding one proton to the nucleus of an atom A) increases its atomic mass by one unit, but does not change its atomic number. B) does not change either its atomic number or its atomic mass. C) converts it to an isotope of the same element. D) converts it to an atom of a different element. E) increases its atomic number by one unit but does not change its atomic mass. A-3

4 27) How many neutrons does an atom of 46 Ti have? 22 A) 22 B) 68 C) 46 D) 24 E) 0 28) Which elements all belong in the same group? A) Fe, Cu, Ni B) B, Si, As C) F, Cl, Br D) C, N, O E) Al, Ge, Sb 29) Which element is most likely to have chemical properties similar to those of potassium (atomic number 19)? A) Sr (atomic number 38) B) Sc (atomic number 21) C) Ca (atomic number 20) D) Rb (atomic number 37) E) Ar (atomic number 18) 30) Which of the following is an alkali metal? A) Cl B) Al C) He D) O E) Na 31) The maximum number of electrons in any orbital is. A) 1 B) 2 C) 3 D) 4 E) 5 32) How many electrons can occupy the shell having n = 2? A) 8 B) 32 C) 6 D) 2 E) 18 33) How many electrons can occupy the 4p subshell? A) 8 B) 10 C) 1 D) 2 E) 6 34) What is the electron configuration of S? A) 1s2 2s2 2p6 3s2 3p4 B) 1s2 2s2 2p6 3s2 3p6 C) 1s2 2s2 2p6 3s2 3p6 4s2 3d1 D) 1s2 2s2 2p6 3s2 3p2 E) 1s2 2s2 2p2 35) The noble gas shortcut electron configuration for nickel is A) [Ne] 3s2 3d8. B) [Ar] 4s2 3d8. C) [Ar] 4s2 4d8. D) [Ne] 4s2 3d8 36) Which group contains only d-block elements? A) Kr, Xe, Rn B) Ni, Pd, Pt C) Po, Fr, Ac D) Ce, Pr, Nd 37) How many electrons are there in the valence shell of a nitrogen atom? A) 0 B) 7 C) 5 D) 2 E) 3 A-4

5 38) A positively charged particle formed by loss of one or more electrons from an atom is called a(an) A) proton. B) cation. C) nucleus. D) anion. E) isotope. 39) Main group elements that are non-metals usually one or more electrons to form, which have a charge. A) lose; cations; positive B) lose; cations; negative C) gain; anions; negative D) gain; cations; positive E) lose; anions; negative 40) The property defined as the energy required to remove one electron from an atom in the gaseous state is A) electronegativity. B) atomic number. C) electron affinity. D) ionization energy. E) none of the above 41) Which of the following ions does not have the same electron configuration as the noble gas neon? A) F - B) O-2 C) Al+3 D) S-2 E) Mg+2 42) What is the most likely charge on an ion formed by an element with a valence electron configuration of ns2np4 where n is an integer from 2 to 6? A) 2- B) 4+ C) 1- D) 2+ E) 6+ 43) All of the following are properties typical of ionic compounds except A) have very high melting points and boiling points. B) exist as crystalline solids at room temperature. C) form distinct molecules by interaction of specific particles. D) shatter when crystals are struck. E) conduct electrical current if dissolved in water. 44) What fourth period element is represented by the dot structure shown? X: A) K B) As C) V D) Ca E) Ti 45) Which of the following elements is most likely to form an ion with a -2 charge? A) S B) Ti C) Si D) K E) Mg 46) What is the formula for the ionic compound formed between lithium and bromide? A) LiB B) Li2Br C) LiBr D) Li+Br- E) LiBr2 A-5

6 47) What is the formula of a compound formed by the ions M2+ and X3-? A) MX3 B) M2X C) M2X3 D) M3X2 E) none of the above 48) Which of the following formulas represents a compound that is an acid? A) NH4Cl B) H3PO4 C) H2O D) CaSO4 E) Mg(OH)2 49) The formula PO4 3- means that this ion is composed of A) one atom of phosphorus, four atoms of oxygen, and three extra electrons. B) one atom of phosphorus,four atoms of oxygen, and three electrons have been lost. C) four atoms of phosphorus, four atoms or oxygen, and three extra electrons. D) one atom of phosphorus, one atom of oxygen, and three extra electrons. E) four atoms of phosphorus, four atoms of oxygen, and three electrons have been lost. 50) Choose the homogeneous mixture from the list below. A) mud B) salsa C) ice water D) salad dressing E) orange soda SHORT ANSWER. Show all work for the following problems, including dimensional analysis. Box your final answer. Sig Figs count! 51) How many mg does a 433 kg sample contain? 52) An imaginary element Xq consists of two isotopes; 69Xq having a mass of amu and 71Xq having a mass of amu. A sample of Xq was found to contain 60.11% of the 69Xq isotope and 39.89% of the 71Xq. Calculate the average atomic weight of a sample of Xq. A-6

7 53) 95.0 F is the same as what temperature in Kelvin? 54) How many dg are contained in 1.20 pounds? 1 kg = lb 55) Determine the volume (in ml) of an object that has a mass of g and a density of 19.3 g/ml. 56) What is the specific heat of a metal if it takes 26.5 calories to raise the temperature of a piece weighing 50.0 g from 22.0 degrees Celsius to 27.0 degrees? Celsius 57) How many B atoms of mass 11.0 amu are present in 27.0 g of B if 1 amu = x10-24g 58) Extra Credit: Write the Long and shortcut electron configuration for Pb. Shortcut (2 pt): Long (3 pts): A-7

8 Nomenclature Portion Please write formulas for the following compounds (2 pts ea): 1. cadmium chloride 2. scandium nitrate 3. sodium permanganate 4. plumbic bromide 5. manganese(ii) nitride 6. zinc bromate 7. sulfuric acid 8. tin(ii) carbonate 9. hydroiodic acid 10. sulfur hexafluoride 11. fluorine gas Please give names for the following compounds. Use the STOCK system where appropriate. 1. BaF 2 2. Fe(OH) 3 3. HClO 4 4. P 2 O 5 5. CaSO 4 6. HCl(aq) 7. Pb(BrO) 4 8. KNO 2 9. (NH 4 ) 2 CrO SCl CuI 2