Question 1

Select the correct statement:

Accepted Answer

A)  Lanthanoid cations are soft Lewis acids. 
B)  Lanthanoid cations can sustain high coordination numbers of seven and above. 
C)  Lanthanoid complexes show strong ligand field effects. 
A)  Lanthanoid cations are soft Lewis acids. 
B)  Lanthanoid cations can sustain high coordination numbers of seven and above. 
C)  Lanthanoid complexes show strong ligand field effects. B

Question 2

Find the correct statement:

Accepted Answer

A)  Pu(VI) is more stable than U(VI). 
B)  Np in all oxidation states prefers forming bonds to hard donor atoms. 
C)  After americium, the stability of +6 oxidation state increases to the right of actinoid series. 
A)  Pu(VI) is more stable than U(VI). 
B)  Np in all oxidation states prefers forming bonds to hard donor atoms. 
C)  After americium, the stability of +6 oxidation state increases to the right of actinoid series. B

Question 3

In the electronic spectra of actinoid compounds the following transitions can be observed:

Accepted Answer

A)  transitions involving only 5f electrons/orbitals 
B)  transitions involving 5f, 6d and ligand-to-metal charge transfer. 
C)  transitions involving 6d and ligand-to metal charge transfer. 
A)  transitions involving only 5f electrons/orbitals 
B)  transitions involving 5f, 6d and ligand-to-metal charge transfer. 
C)  transitions involving 6d and ligand-to metal charge transfer. B

Question 4

Identify the correct statement about lanthanoids.

Accepted Answer

A)  The ionic radii of Ln3+decrease from left to right. 
B)  The first ionization energy for lanthanoids decreases from left to right. 
C)  The 4f electrons are important in the formation of metallic bond 
A)  The ionic radii of Ln3+decrease from left to right. 
B)  The first ionization energy for lanthanoids decreases from left to right. 
C)  The 4f electrons are important in the formation of metallic bond

Question 5

What is the difference between 4f and 5f atomic orbitals?

Accepted Answer

A)  4f atomic orbitals are more core-like than 5f atomic orbitals 
B)  Both 4f and 5f atomic orbitals are destabilized and very diffuse. 
C)  5f atomic orbitals are poorly shielded from the nucleus in comparison to 4f atomic orbitals. 
A)  4f atomic orbitals are more core-like than 5f atomic orbitals 
B)  Both 4f and 5f atomic orbitals are destabilized and very diffuse. 
C)  5f atomic orbitals are poorly shielded from the nucleus in comparison to 4f atomic orbitals.

Question 6

The highest oxidation state for actinoids is:

Accepted Answer

A)  +3 
B)  +4 
C)  +6 
A)  +3 
B)  +4 
C)  +6

Question 7

In comparison to lanthanoids, actinoids:

Accepted Answer

A)  are more reducing metals. 
B)  have more accessible oxidation states. 
C)  are more abundant in nature. 
A)  are more reducing metals. 
B)  have more accessible oxidation states. 
C)  are more abundant in nature.

Question 8

What is the most common oxidation state for lanthanoid elements?

Accepted Answer

A)  +2 
B)  +3 
C)  +4 
A)  +2 
B)  +3 
C)  +4

Question 9

What types of binary ionic compounds are well-known for all lanthanides?

Accepted Answer

A)  oxides, halides, hydrides, and nitrides 
B)  hydrides and nitrides only 
C)  oxides and halides only 
A)  oxides, halides, hydrides, and nitrides 
B)  hydrides and nitrides only 
C)  oxides and halides only

Question 10

Find the correct statement(s) on lanthanoid organometallic chemistry.
(i) The bonding in organolanthanoid compounds is predominantly ionic.
(ii) Lanthanoids frequently form carbonyl clusters with metals in low oxidation states.
(iii) Electronic effects dominate over steric effects in reactivity and structural considerations.

Accepted Answer

A)  All of them are correct. 
B)  (ii) and (i) 
C)  (i) only. 
A)  All of them are correct. 
B)  (ii) and (i) 
C)  (i) only.

Select the correct statement:

Find the correct statement:

In the electronic spectra of actinoid compounds the following transitions can be observed:

Identify the correct statement about lanthanoids.

What is the difference between 4f and 5f atomic orbitals?

The highest oxidation state for actinoids is:

In comparison to lanthanoids, actinoids:

What is the most common oxidation state for lanthanoid elements?

What types of binary ionic compounds are well-known for all lanthanides?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

D-Metal Organometallic Chemistry

Materials Chemistry and Nanomaterials

Green Chemistry

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

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Exam 23: The F-Block Metals

Select the correct statement:

Find the correct statement:

In the electronic spectra of actinoid compounds the following transitions can be observed:

Identify the correct statement about lanthanoids.

What is the difference between 4f and 5f atomic orbitals?

The highest oxidation state for actinoids is:

In comparison to lanthanoids, actinoids:

What is the most common oxidation state for lanthanoid elements?

What types of binary ionic compounds are well-known for all lanthanides?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

D-Metal Organometallic Chemistry

Materials Chemistry and Nanomaterials

Green Chemistry

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

Filters