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Which one of the following elements is likely to exhibit the most violent and rapid reaction with water?


A) Na
B) Rb
C) Mg
D) Sr
E) Cl2

F) B) and D)
G) A) and E)

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Write balanced equations, showing all reactants and products, to represent a. the reaction of lithium metal with oxygen to form lithium oxide. b. the formation of ammonia in the Haber process.

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a. 4Li(s) + O2(g) F1F...

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In which of the following ways is lithium different from the other alkali metals?


A) Its salts are much more soluble in water than those of the other alkali metals.
B) It has an unusually high density.
C) It forms molecular compounds with the hydrocarbon groups of organic halides.
D) Its ionization energy is lower than expected.
E) It does not react with water at room temperature.

F) C) and D)
G) All of the above

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Each one of the following statements applies to an element or elements from one of the main groups (1A through 8A). Identify the group number appropriate to each of the statements, and write it in the left hand margin alongside that statement. a. This group contains the element with the lowest ionization potential of any element. b. The maximum oxidation number of any element in this group is +5. c. An element X in this group forms a stable, unreactive gas, XF6.

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a. 1A (1)
...

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Which of the following would you predict to have the greatest thermal stability?


A) AsAt3
B) AsI3
C) AsBr3
D) AsCl3
E) AsF3

F) A) and D)
G) C) and D)

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Thallium can form two oxides, Tl2O and Tl2O3. Which will be the more basic substance?


A) Tl2O
B) Tl2O3
C) They have the same strength as bases.
D) Neither compound has any acidic or basic properties.
E) More information is needed to make an accurate prediction.

F) C) and D)
G) A) and D)

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Predict the products for the following set of reactants. K2O(s) + H2O(l)


A) K+(aq) + OH-(aq) + H2(g)
B) K+(aq) + OH-(aq)
C) K+(aq) + H2(g) + O2(g)
D) KH(s) + O2(g)
E) K+(aq) + OH-(aq) + H2O2(aq)

F) A) and B)
G) B) and E)

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Write balanced equations, showing all reactants and products, to represent a. the reaction of calcium metal with water. b. the reaction of aluminum metal with oxygen gas.

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a. Ca(s) + 2H2O(l) F1...

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Potassium nitrate is a strong reducing agent.

A) True
B) False

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Which of the following bonds should have the greatest ionic character?


A) O-F
B) N-F
C) C-F
D) B-F
E) Cl-F

F) B) and E)
G) C) and E)

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Which of the following elements has the lowest electronegativity?


A) Al
B) S
C) Mg
D) In
E) Ba

F) A) and B)
G) A) and C)

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The acidity of oxides of main group elements increases down a group, from top to bottom.

A) True
B) False

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Predict the products for the reaction of the following set of reactants. MgCO3(s) + heat


A) Mg(s) + CO(g)
B) Mg(s) + CO2(g)
C) MgO(s) + CO(g)
D) MgO(s) + CO2(g)
E) no reaction

F) C) and E)
G) All of the above

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Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?


A) Some aluminum compounds and all beryllium compounds show significant covalent character in the gas phase.
B) Beryllium forms bridge bonds in its hydrides while aluminum does not.
C) Both form oxides that are impervious to reaction with water.
D) The cations for both strongly polarize nearby electron clouds.
E) Beryllium occurs in nature as the uncombined element, whereas aluminum does not.

F) B) and C)
G) A) and B)

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Hydrogen fluoride is used


A) in the manufacture of steel.
B) in the synthesis of cryolite for aluminum production.
C) as an oxidizing agent.
D) as a disinfectant.
E) as a mouthwash.

F) A) and B)
G) A) and E)

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Predict the products for the following set of reactants. Bi(s) + Cl2(g)


A) BiCl
B) BiCl2
C) BiCl3
D) BiCl4
E) BiCl5

F) A) and B)
G) B) and E)

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The Haber process is the first step in the manufacture of sulfuric acid.

A) True
B) False

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Sulfuric acid is produced when sulfur dioxide dissolves in water.

A) True
B) False

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Predict the products for the reaction of the following set of reactants. Mg(s) + Cl2(g)


A) MgCl(s)
B) MgCl2(s)
C) MgCl(l)
D) MgCl2(l)
E) MgCl2(aq)

F) C) and E)
G) A) and C)

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Which of the following atoms has the smallest volume?


A) Ba
B) Cs
C) Sr
D) Rb
E) I

F) A) and D)
G) B) and C)

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