Basic Concepts of Chemical Bonding Test (Answer Key Part 2)

34) Of the bonds C-C, C C, and C≡C, the C-C bond is ________. A) strongest/shortest B) strongest/longest C) weakest/longest D) weakest/shortest E) intermediate in both strength and length Answer: C 35) Of the bonds C-N, C N, and C≡N, the C-N bond is ________. A) strongest/shortest B) strongest/longest C) weakest/shortest D) weakest/longest E) intermediate in both strength and length Answer: D 36) As the number of covalent bonds between two atoms increases, the distance between the atoms ________ and the strength of the bond between them ________. A) increases, increases B) decreases, decreases C) increases, decreases D) decreases, increases E) is unpredictable, is unpredictable Answer: D 37) Of the possible bonds between carbon atoms (single, double, and triple), ________. A) a triple bond is longer than a single bond B) a double bond is stronger than a triple bond C) a single bond is stronger than a triple bond D) a double bond is longer than a triple bond E) a single bond is stronger than a double bond Answer: D 38) Most explosives are compounds that decompose rapidly to produce ________ products and a great deal of ________. A) gaseous, gases B) liquid, heat C) soluble, heat D) solid, gas E) gaseous, heat Answer: E 39) Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose. What is another name for dynamite? A) KBr B) KOH C) TNT D) C-4 E) CFC Answer: C 40) ________ is an explosive made of nitroglycerine and an absorbent such as diatomaceous earth. A) KOH B) TNT C) C-4 D) KBr E) CFC Answer: B 8.2 Bimodal Questions 1) Based on the octet rule, magnesium most likely forms a ________ ion. A) Mg2+ B) Mg2C) Mg6D) Mg6+ E) MgAnswer: A 2) Based on the octet rule, phosphorus most likely forms a ________ ion. A) P3+ B) P3C) P5+ D) P5E) P+ Answer: B 3) Based on the octet rule, aluminum most likely forms an ________ ion. A) Al3+ B) Al4+ C) Al4D) Al+ E) AlAnswer: A 4) Based on the octet rule, iodine most likely forms an ________ ion. A) I2+ B) I4+ C) I4D) I+ E) IAnswer: E 5) The electron configuration of the phosphide ion (P3-) is ________. A) [Ne]3s2 B) [Ne]3s23p1 C) [Ne]3s23p3 D) [Ne]3p2 E) [Ne]3s23p6 Answer: E 6) The electron configuration of the sulfide ion (S2-) is ________. A) [Ne]3s2 B) [Ne]3s23p1 C) [Ne]3s23p4 D) [Ne]3p2 E) [Ne]3s23p6 Answer: E 7) The halogens, alkali metals, and alkaline earth metals have ________ valence electrons, respectively. A) 7, 4, and 6 B) 1, 5, and 7 C) 8, 2, and 3 D) 7, 1, and 2 E) 2, 7, and 4 Answer: D 8) The only noble gas without eight valence electrons is ________. A) Ar B) Ne C) He D) Kr E) All noble gases have eight valence electrons. Answer: C 9) Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) O, Se B) Sr C) Na D) Br E) Sr, O, Se Answer: B 10) Which of the following would have to lose three electrons in order to achieve a noble gas electron configuration? Si Mg Al Cl P A) Si, P B) Al C) P D) Cl E) Mg, Al, P Answer: B 11) Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) Br B) Sr C) Na D) O, Se E) Sr, O, Se Answer: D 12) For a given arrangement of ions, the lattice energy increases as ionic radius ________ and as ionic charge ________. A) decreases, increases B) increases, decreases C) increases, increases D) decreases, decreases E) This cannot be predicted. Answer: A 13) For a given arrangement of ions, the lattice energy decreases as ionic radius ________ and as ionic charge ________. A) decreases, increases B) increases, decreases C) increases, increases D) decreases, decreases E) This cannot be predicted. Answer: B 14) The electron configuration of the S2- ion is ________. A) [Ar]3s23p6 B) [Ar]3s23p2 C) [Ne]3s23p2 D) [Ne]3s23p6 E) [Kr]3s22p6 Answer: D 15) The electron configuration of the P3- ion is ________. A) [Ar]3s23p6 B) [Ar]3s23p2 C) [Ne]3s23p6 D) [Ne]3s23p2 E) [Kr]3s22p6 Answer: C 16) What species has the electron configuration [Ar]3d2? A) Mn2+ B) Cr2+ C) V3+ D) Fe3+ E) K+ Answer: C 17) What species has the electron configuration [Ar]3d4? A) Mn2+ B) Cr2+ C) V3+ D) Fe3+ E) K+ Answer: B 18) What is the electron configuration for the Co2+ ion? A) [Ar]4s13d6 B) [Ar]3d7 C) [Ar]3d5 D) [Ar]4s23d9 E) [Ne]3s23p10 Answer: B 19) What is the electron configuration for the Fe3+ ion? A) [Ar]4s13d6 B) [Ar]4s03d7 C) [Ar]4s03d5 D) [Ar]4s23d9 E) [Ne]3s23p10 Answer: C 20) What is the electron configuration for the Cu2+ ion? A) [Ar]4s13d10 B) [Ar]4s03d10 C) [Ar]4s03d9 D) [Ar]4s23d9 E) [Ar]4s03d11 Answer: C 21) The formula of palladium (IV) sulfide is ________. A) Pd2S4 B) PdS4 C) Pd4S D) PdS2 E) Pd2S2 Answer: D 22) Elements from opposite sides of the periodic table tend to form ________. A) covalent compounds B) ionic compounds C) compounds that are gaseous at room temperature D) homonuclear diatomic compounds E) covalent compounds that are gaseous at room temperature Answer: B 23) Determining lattice energy from Born-Haber cycle data requires the use of ________. A) the octet rule B) Coulomb's law C) Periodic law D) Hess's law E) Avogadro's number Answer: D 24) A ________ covalent bond between the same two atoms is the longest. A) single B) double C) triple D) strong E) They are all the same length. Answer: A 25) How many hydrogen atoms must bond to silicon to give it an octet of valence electrons? A) 1 B) 2 C) 3 D) 4 E) 5 Answer: D 26) A double bond consists of ________ pairs of electrons shared between two atoms. A) 1 B) 2 C) 3 D) 4 E) 6 Answer: B 27) A triple bond consists of ________ pairs of electrons shared between two atoms. A) 1 B) 2 C) 3 D) 4 E) 6 Answer: C 28) What is the maximum number of double bonds that a hydrogen atom can form? A) 0 B) 1 C) 2 D) 3 E) 4 Answer: A 29) What is the maximum number of double bonds that a carbon atom can form? A) 4 B) 1 C) 0 D) 2 E) 3 Answer: D