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Exam 23: The Transition Elements and Their Coordination Compounds

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Question 41

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Chromium and manganese are among the transition elements that form several different oxides. Which of the following statements characterize these oxides?

A) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from acidic to basic.
B) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from basic to acidic.
C) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from acidic to basic.
D) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from basic to acidic.
E) None of these choices is correct.

F) B) and D)
G) None of the above

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Question 42

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Which of the following ions could exist in either the high-spin or low-spin state in an octahedral complex?

A) Sc³⁺
B) Ni²⁺
C) Mn²⁺
D) Ti⁴⁺
E) Zn²⁺

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

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Question 43

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Which one of the following has the ground state electron configuration [Ar]3d¹⁰4s¹?

Which of the following ligands is most likely to form a low-spin octahedral complex with iron(III) ?

Octahedral complexes can exhibit geometric, optical and linkage isomerism.

Give one important use of the following metals or their compounds. A) chromium B) manganese C) mercury D) silver

Aluminum reacts with oxygen in the air to form a protective oxide coating. Silver also reacts with compounds in air to form a black coating. What substance is formed?

Which of the following transition elements can have an oxidation number of +7?

The most common oxidation state for ions of the inner transition elements is:

10.0 mL of a 0.100 mol/L solution of a metal ion M²⁺ is mixed with 10.0 mL of a 0.100 mol/L solution of a ligand L. A reaction occurs in which the product is ML₃²⁺. Approximately, what is the maximum concentration of ML₃²⁺, in mol/L, which could result from this reaction?

Consider the following structures (1 and 2 are octahedral; 3 and 4 are square planar) . Which one of the following statements about the above structures is correct?

Which of the following atoms has the biggest radius?

Apply the valence bond theory to predict the electronic structure and hybridization pattern of chromium in the complex ion Cr(NH₃)₆³⁺.

Which of the following is considered a bidentate ligand?

Write the formula for diamminedichloroethylenediaminecobalt(III) bromide.

Tetrahedral complexes can exhibit both optical and linkage isomerism.

In the presence of a strong octahedral ligand field, the number of unpaired electrons in Co(III) will be

Give the systematic name for [CoCl₃(H₂O) ]¯.

A certain transition element has the stable oxidation states of +2, +3, +4, +5, and +6. In which state will the element be most likely to form an ionic bond with chlorine?

The inner transition series of elements arise from the filling of f orbitals.