Multiple-choice test or survey (3-answer)



CHM 1032-0001 Exam 1 Fall 2020Instructor: Name:Date:What are the basic SI units of length?mileinchmetercentimeterAll of the aboveGroup 2A elements are called?Alkali Earth MetalsAlkaline Earth MetalsBoth A and BNone of the aboveThe exponential 104 is equal to which decimal number?1010,00011,000None of the above The correct number of significant figures in the number 1.2501 ? 10-3 is:574ambiguousnone of the aboveHow many significant figures should be reported in the answer to the following calculation?(95.43)(63.002)(0.0090)3421None of the above How many cm3 are in 2.5m32.5 x 1062.5 x 10-22.5 x 1022.5 x 10-6None of the aboveThe jet fuel in an airplane has a mass of 97.5kg and a density of 0.804g/cm3. What is the volume of this jet fuel?1.21 x 105 cm37.84 x 10-2 cm37.84 x 104 cm31.21 x 102 cm3How many significant figures should be reported in the answer to the following calculation?(43.980) x (19.0023+25)=3241None of the aboveA radiolabeled isotope of sodium-24 contains:11 protons, 11 neutrons, 11 electrons24 protons, 11 neutrons, 24 electrons11 protons, 13 neutrons, 11 electrons11 protons, 13 neutrons, 11 electrons None of the aboveWhat is the density of a block that is 12.0cm x 6.00cm x 2.00 cm and has a mass of 356g1.00g/cm34.95 g/cm33.56 g/cm32.47 g/cm3None of the aboveA chemist mixes sodium with water and witnesses a violent reaction between the metal and water. This is best classified asAn observationA hypothesisA lawA theoryAll of the following statements in Dalton’s atomic theory are true EXCEPTEach element is composed of tiny indestructible particles called atomsAtoms combine in simple, whole number ratios to form compoundsAtoms of one element can change into atoms of another elementAll atoms of a given element cannot change into atoms of another elementHow many valence electrons are drawn for a phosphorus atom using Lewis structure?5432 none of the aboveWhich element has the smallest atomic radius?CSiBeFnone of the aboveWhen potassium forms an ion, it loses electrons, how many electrons does it lose, and in which orbital(s) do the electrons come from 1 electron; one from the 3s orbital 5 electrons; two from the 3s orbital and three from the 3p orbital2 electrons; one from the 4s orbital and one from the 4p orbital 1 electron; one from the 4s orbital none of the aboveWhat is the electron configuration for Ge?1s22s22p63s23p64s24d104p21s22s23p64s25s26d107p21s22s22p63s23p64s23d104p21s22s22p63s23p63d104s24p2none of the aboveWhich electron transition in the Bohr model would produce electromagnetic radiation with the highest energy?n=2n=1n=3n=2n=5n=4n=4n=3none of the aboveWhat is the correct order of the electromagnetic spectrum from lowest frequency to highest frequency?Gamma RaysX-RaysVisible LightUltraviolet RadiationInfrared RadiationMicrowavesRadio WavesGamma RaysX-RaysInfrared RadiationUltraviolet RadiationVisible Light MicrowavesRadio WavesRadio WavesMicrowavesUltraviolet RadiationVisible Light Infrared RadiationX-RaysGamma RaysRadio WavesMicrowavesInfrared RadiationVisible Light Ultraviolet RadiationX-RaysGamma RaysGamma RaysRadio WavesX-RaysInfrared RadiationUltraviolet RadiationVisible LightHow many unpaired orbitals are in chlorine?4321None of the aboveAn atoms valence electrons are those important in?physical bondingintermolecular forcesintramolecular forceschemical bondingnone of the aboveDisclaimer: I have made this review to the best of my ability. It is not comprehensive and should only be used as an aid to your review, not as your only study tool. All the problems are from Tro, Nivaldo J. Chemistry a Molecular Approach 4th ed., Pearson/Prentice Hall, 2017 and in collaboration with problems from Dr. Amel Garbou Zero RulesAll nonzero digits are significant.0.0110Interior zeros (zeros between two numbers) are significant.50.1Trailing zeros (zeros to the right of a nonzero number) that fall after a decimal point are significant. 5.103.00Trailing zeros that fall before a decimal point are significant. 50.001700.24Leading zeros (zeros to the left of the first nonzero number) are NOT significant. They only serve to locate the decimal point. 0.0005Trailing zeros at the end of a number, but before an implied decimal point, are ambiguous and should be avoided. 350350.0 3.5 x 102 (two significant figures) Or 3.50 x 102 (three significant figures)Multiplication and Division RuleThe result of multiplication or division carries the same number of significant figures as the factor with the fewest significant figures.Addition and SubtractionIn addition or subtraction calculations, the result carries the same number of decimal places as the quantity carrying the fewest decimal placesCombined OperationsWhen doing calculations that involve both multiplication or division and addition or subtraction, first do a calculation for the operation shown in parenthesis and round that value to the correct number of significant figures, then use the rounded number to carry out the next operation.EM spectrum28. Orbitals fill in the following order: 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s29. Valence electrons are the electrons in the outermost shell (look for highest number in front of the letters and that’s your outermost shell\Main Group elements information ................
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