SL IB Final Exam 2013Multiple ChoiceIdentify the choice that best completes the statement or answers the question.____ 1. Which of the following measurements contains two significant figures?a.0.004 00 L c.0.000 44 Lb.0.004 04 L d.0.004 40 L____ 2. Which of the following measurements is expressed to three significant figures?a.0.007 m c.7.0 10!mb.7077 mg d.0.070 mm____ . "ow man# significant figures are in the measurement 40$%00 mg?a.two c.fourb.three d.fi&e____ 4. 'f ( is the s#mbol for an element$ which two of the following s#mbols represent isotopes of the same element?1.( 2.( .( 4.(a.1 and 2 c.1 and 4b. and 4 d.2 and ____ %. "ow is the number of neutrons in the nucleus of an atom calculated?a.)dd the number of electrons and protons together.b.*ubtract the number of electrons from the number of protons.c.*ubtract the number of protons from the mass number.d.)dd the mass number to the number of electrons.____ +. Which of the following statements is ,-. true?a /rotons ha&e a positi&e charge..b.(lectrons are negati&el# charged and ha&e a mass of 1 amu.c..he nucleus of an atom is positi&el# charged.d.,eutrons are located in the nucleus of an atom.____ 7. "ow does the energ# of an electron change when the electron mo&es closer to the nucleus?a.'t decreases. c.'t sta#s the same.b.'t increases. d.'t doubles.____ 0. When an electron mo&es from a lower to a higher energ# le&el$ the electron ____.a.alwa#s doubles its energ#b.absorbs a continuousl# &ariable amount of energ#c.absorbs a 1uantum of energ#d.mo&es closer to the nucleus____ 2. 'f the spin of one electron in an orbital is cloc!wise$ what is the spin of the other electron in that orbital?a.3ero c.countercloc!wiseb.cloc!wise d.both cloc!wise and countercloc!wise____ 10. Which t#pe of electromagnetic radiation includes the wa&elength 10m?a.gamma ra# c.radio wa&eb.microwa&e d.&isible light____ 11. Which of the following elements is in the same period as phosphorus?a.carbon c.nitrogenb.magnesium d.ox#gen____ 12. -f the elements 4e$ "g$ 5$ and .e$ which is a representati&e element?a.4e c.5b."g d..e____ 1. )tomic si3e generall# ____.a.increases as #ou mo&e from left to right across a periodb.decreases as #ou mo&e from top to bottom within a groupc.remains constant within a periodd.decreases as #ou mo&e from left to right across a period____ 14. 'n which of the following sets are the charges gi&en correctl# for all the ions?a.,a $ 6g $ )lc.7b $ 8a $ /b.9 $ *r $ -d., $ - $ 4____ 1%. "ow man# electrons does sil&er ha&e to gi&e up in order to achie&e a pseudo:noble:gas electron configuration?a.1 c.b.2 d.4____ 1+. "ow man# electrons does nitrogen gain in order to achie&e a noble:gas electron configuration?a 1 c . .b.2 d.4____ 17. "ow does ox#gen obe# the octet rule when reacting to form compounds?a.'t gains electrons.b.'t gi&es up electrons.c.'t does not change its number of electrons.d.-x#gen does not obe# the octet rule.____ 10. What does the term coordination number in ionic cr#stals refer to?a.the total number of &alence electrons in an atomb.the number of oppositel# charged ions surrounding a particular ionc.the number of atoms in a particular formula unitd.the number of li!e:charged ions surrounding a particular ion____ 12. Which of the following elements can form diatomic molecules held together b# triple co&alent bonds?a.carbon c.fluorineb.ox#gen d.nitrogen____ 20. Where are the electrons most probabl# located in a molecular bonding orbital?a.an#where in the orbitalb.between the two atomic nucleic.in stationar# positions between the two atomic nucleid.in circular orbits around each nucleus____ 21. What t#pe of h#bridi3ation occurs in the orbitals of a carbon atom participating in a triple bond with another carbon atom?a.c.b.d.____ 22. What are the wea!est attractions between molecules?a.ionic forces c.co&alent forcesb.;an der Waals forces d.h#drogen forces____ 2. What is the correct name for the , ion?a.nitrate ion c.nitride ionb.nitrogen ion d.nitrite ion____ 24. 'n which of the following is the name and formula gi&en correctl#?a.sodium oxide$ ,a- c.cobaltous chloride$ A " -=s> A,a < " - =aq>a22.4 L of are produced for e&er# liter of < " - =aq> reacted..b.1 mole of water is produced for e&er# mole of carbon dioxide produced.c.+.02 10molecules of ,a < " - =aq> are produced for e&er# mole of ,a" used.d.%4 g of water are produced for e&er# mole of ,a" produced.____ 4+. Blucose$ < " - $ is a good source of food energ#. When it reacts with ox#gen$ carbon dioxide and water are formed. "ow man# liters of A +7 !cala.4.21 L c.1%.7 Lb.%. L d.24.1 L____ 47. 6ethane and h#drogen sulfide form when h#drogen reacts with carbon disulfide. 'dentif# the excess reagent and calculate how much remains after + L of "reacts with 12 L of A 2" *=g>a. L