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Each of the pictures (a) -(d) represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order. Each of the pictures (a) -(d) represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order.   -Which picture corresponds to potassium fluoride? A) picture (a)  B) picture (b)  C) picture (c)  D) picture (d) -Which picture corresponds to potassium fluoride?


A) picture (a)
B) picture (b)
C) picture (c)
D) picture (d)

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Using shorthand notation,the ground-state electron configuration for C4- is predicted to be ________.

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The following four spheres represent a Na atom,a Na+ ion,a Cl atom,and a Cl- ion,not necessarily in that order.Use your knowledge about the relative sizes of atoms,cations,and anions to determine which of the following sets of reactions is most consistent with the sizes of the atoms and ions shown below. The following four spheres represent a Na atom,a Na<sup>+</sup> ion,a Cl atom,and a Cl<sup>-</sup> ion,not necessarily in that order.Use your knowledge about the relative sizes of atoms,cations,and anions to determine which of the following sets of reactions is most consistent with the sizes of the atoms and ions shown below.   A) A → B + e<sup>-</sup> and C → D + e<sup>-</sup> B) A → B + e<sup>-</sup> and D → C + e<sup>-</sup> C) B → A + e<sup>-</sup> and C → D + e<sup>-</sup> D) B → A + e<sup>-</sup> and D → C + e<sup>-</sup>


A) A → B + e- and C → D + e-
B) A → B + e- and D → C + e-
C) B → A + e- and C → D + e-
D) B → A + e- and D → C + e-

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Which of the following ionic compounds would be expected to have the highest lattice energy?


A) LiF
B) LiCl
C) LiBr
D) LiI

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Which alkali metal reacts with nitrogen to form a nitride?


A) Li
B) Na
C) K
D) All of these

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Which of the following elements is a solid at room temperature?


A) fluorine
B) chlorine
C) bromine
D) iodine

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Using shorthand notation,the ground-state electron configuration for Tl+ is predicted to be ________.

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  -Atoms of which element,indicated by letter on the periodic table above,would be expected to have the highest first ionization energy,E<sub>i1</sub>? A) A B) B C) C D) D -Atoms of which element,indicated by letter on the periodic table above,would be expected to have the highest first ionization energy,Ei1?


A) A
B) B
C) C
D) D

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Calculate the energy change for the formation of CaF2(s) from its elements in their standard states and the following information: Calculate the energy change for the formation of CaF<sub>2</sub>(s) from its elements in their standard states and the following information:   A) +4046 kJ/mol B) -965 kJ/mol C) -1214 kJ/mol D) -3286 kJ/mol


A) +4046 kJ/mol
B) -965 kJ/mol
C) -1214 kJ/mol
D) -3286 kJ/mol

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The four spheres below represent K+,Ca2+,Cl-,and S2-,not necessarily in that order. The four spheres below represent K<sup>+</sup>,Ca<sup>2+</sup>,Cl<sup>-</sup>,and S<sup>2-</sup>,not necessarily in that order.   -Which sphere most likely represents the Ca<sup>2+</sup> ion? A) A B) B C) A or B D) C or D -Which sphere most likely represents the Ca2+ ion?


A) A
B) B
C) A or B
D) C or D

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To reach a noble gas electron configuration how many electrons would sulfur have to adopt?


A) 1
B) 2
C) 6
D) 8

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Which liberates the most energy?


A) Br(g) + e⁻ → Br⁻(g)
B) Cl(g) + e⁻ → Cl⁻(g)
C) F(g) + e⁻ → F⁻(g)
D) I(g) → I⁻(g)

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What is the name for the group of elements indicated by the shaded portion of the periodic table? What is the name for the group of elements indicated by the shaded portion of the periodic table?   A) alkali metals B) alkaline earth metals C) inner-transition metals D) transition metals


A) alkali metals
B) alkaline earth metals
C) inner-transition metals
D) transition metals

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  -Which of the above pictures are more likely to represent covalent compounds? A) pictures (a) and (b)  B) pictures (a) and (d)  C) pictures (b) and (c)  D) pictures (b) and (d) -Which of the above pictures are more likely to represent covalent compounds?


A) pictures (a) and (b)
B) pictures (a) and (d)
C) pictures (b) and (c)
D) pictures (b) and (d)

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Interhalogen compounds can be produced by reacting two different halogens together.Which one of the following compounds does not exist?


A) ClF
B) ClBr
C) ClBr3
D) IF3

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Which is not a chemical reaction of the alkali metal sodium?


A) 4 Na(s) + 2 O2(g) → 2 Na2O(s) + Na2O2(s)
B) 2 Na(s) + 2 NH3(l) → 2 NaNH2(sol) + H2(g)
C) 2 Na(s) + Cl2(g) → 2 NaCl(s)
D) 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)

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  -Which element,indicated by letter on the periodic table above,has a 1+ ion with the electron configuration [Xe]6s<sup>2</sup> 4f<sup>14</sup> 5d<sup>10</sup>? A) A B) B C) C D) D -Which element,indicated by letter on the periodic table above,has a 1+ ion with the electron configuration [Xe]6s2 4f14 5d10?


A) A
B) B
C) C
D) D

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Which alkali metal forms preferentially an oxide rather than a peroxide or superoxide?


A) Li
B) Na
C) K
D) Rb

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Calculate the lattice energy for NaCl(s) using a Born-Haber cycle and the following information: Calculate the lattice energy for NaCl(s) using a Born-Haber cycle and the following information:   A) +34.8 kJ/mol B) +690.3 kJ/mol C) +787.2 kJ/mol D) +1512 kJ/mol


A) +34.8 kJ/mol
B) +690.3 kJ/mol
C) +787.2 kJ/mol
D) +1512 kJ/mol

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  -Which element,indicated by letter on the periodic table above,has a 2+ ion with the electron configuration [Ar]3d<sup>10</sup>? A) A B) B C) C D) D -Which element,indicated by letter on the periodic table above,has a 2+ ion with the electron configuration [Ar]3d10?


A) A
B) B
C) C
D) D

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