Question 1

Which of the following statements is incorrect concerning the 3d,4d,and 5d transition series?
A)There is a large increase in radius in going from the 3d to the 4d metals.
B)There is a general increase in size going left to right across each series due to an increasing number of electrons.
C)Hafnium through mercury exhibit what is referred to as the lanthanide contraction.
D)The separation of hafnium and zirconium found together in nature is difficult due to their similar chemistries,which are attributed to their virtually identical sizes.
E)The transition metal from a period 6 group is similar in size to the peroid 5 transition metal sitting above it on the periodic table.

Accepted Answer

The statement "There is a general increase in size going left to right across each series due to an increasing number of electrons" is incorrect. The size of atoms actually tends to decrease going left to right across a period, despite the increasing number of electrons, due to increased effective nuclear charge pulling the electrons closer to the nucleus.

Question 2

What is the maximum oxidation state for niobium,Nb?
A)4
B)3
C)2
D)6
E)5

Accepted Answer

The maximum oxidation state for niobium (Nb) is +5. This is because niobium can lose all five of its valence electrons, reaching a +5 oxidation state.

Question 3

What is the maximum oxidation state expected for manganese?
A)+7
B)+4
C)+5
D)+8
E)+6

Accepted Answer

Manganese can exhibit a maximum oxidation state of +7, as seen in permanganate ions (MnO4^-). This is due to the fact that manganese has a [Ar]3d^54s^2 electron configuration, allowing it to lose all seven electrons (five from the 3d subshell and two from the 4s subshell) to achieve this oxidation state.

Question 4

In which compound is cobalt in the highest oxidation state? A)Co₂(CO)₈ B)[Co(NH₃)₆]Cl₂ C)[Co(NH₃)₄Cl₂]Cl D)Na₂[CoCl₄] E)K₄[CoF₆]

Accepted Answer

The answer of In which compound is cobalt in the...

Question 5

Which of the following first-row transition elements is not able to have a +3 oxidation state?
A)Sc
B)Cr
C)V
D)Zn
E)Fe

Accepted Answer

Zinc (Zn) is a first-row transition element that has only one oxidation state, which is +2. It does not have any other common oxidation states.

Question 6

A property that many representative nonmetals and many transition elements share is that they both have
A)color in many compounds.
B)many paramagnetic compounds.
C)high electronegativities.
D)many compounds that observe the octet rule.
E)many oxidation states.

Accepted Answer

Many representative nonmetals and transition elements share the property of having many oxidation states. This allows them to form a wide variety of compounds by gaining, losing, or sharing electrons in different ways.

Question 7

The oxidation number of which of the following elements is often +2 but can be as great as +7?
A)manganese
B)cobalt
C)aluminum
D)bismuth
E)chromium

Accepted Answer

Manganese often has an oxidation state of +2 in compounds like MnO, MnCl2, but it can exhibit a wide range of oxidation states from +2 up to +7, as seen in permanganate (MnO4^-), where it has an oxidation state of +7.

Question 8

In which of the following compounds is the metal atom not in a common oxidation state? A)CrOCl₂ B)NiF₂ C)CuI D)Zn(NO₃)₂ E)MnSO₄

Accepted Answer

Chromium in CrOCl exhibits an uncommon oxidation state. Typically, chromium shows oxidation states of +2, +3, and +6, but in CrOCl, it has an oxidation state of +5, which is less common.

Question 9

Which of the following is not a transition-metal?
A)cobalt
B)iridium
C)vanadium
D)rhodium
E)rubidium

Accepted Answer

Rubidium is not a transition metal. It is an alkali metal with atomic number 37. The other options listed (cobalt, iridium, vanadium, and rhodium) are all transition metals.

Question 10

What is the maximum oxidation state for rhenium,Re?
A)6
B)3
C)2
D)7
E)4

Accepted Answer

The maximum oxidation state for rhenium is +7. This is because it has 7 valence electrons in its outermost shell and can potentially lose all of them to become a cation with a full d subshell.

Question 11

All of the following elements have the oxidation states listed except
A)Ti,+3.
B)Zn,+3.
C)V,+3.
D)Co,+3.
E)Fe,+3.

Accepted Answer

Zinc (Zn) is a transition metal and can only have oxidation states of +2 or 0. It cannot have an oxidation state of +3.

Question 12

Which of the following is not a characteristic property of transition-element compounds?
A)Most of them are colored.
B)Most of them are paramagnetic.
C)Most of the metals exhibit multiple oxidation states.
D)Most of the elements form many complexes.
E)Most of the elements,upon ionizing,lose the d electrons first.

Accepted Answer

The statement "Most of the elements, upon ionizing, lose the d electrons first" is not a characteristic property of transition-element compounds. In fact, transition metals tend to lose their outer s electrons first, followed by the d electrons.

Question 13

Transition metals can be distinguished from main-group metals by the fact that
A)main-group metals have only +1 or +2 oxidation states.
B)transition metals have higher relative atomic weights than main-group metals.
C)transition metals have a greater tendency to form colored compounds than main-group metals.
D)main-group metals have higher relative atomic weights than transition metals.
E)only the main-group metals can form complex ions.

Accepted Answer

Transition metals have a greater tendency to form colored compounds than main-group metals due to their partially filled d-orbitals, which allow for electronic transitions that absorb certain wavelengths of light and reflect others, resulting in a distinct color. Main-group metals, on the other hand, have completely filled s-orbitals and partially filled p-orbitals, which typically do not allow for the same electronic transitions and hence do not often form colored compounds.

Question 14

The phenomenon called __________ contraction is responsible for the great similarity in atomic size and chemistry of 4d and 5d elements.
A)coordination
B)isomeric
C)lanthanide
D)transition
E)none of these

Accepted Answer

Lanthanide contraction is responsible for the similarity in atomic size and chemistry between 4d and 5d elements, due to the poor shielding effect of 4f electrons.

Question 15

Which of the following is not a characteristic of the transition metals?
A)variable oxidation state
B)the ability to form many colored compounds
C)valence electrons in a d subshell
D)high electronegativity
E)the ability to form complex ions

Accepted Answer

Transition metals generally have lower electronegativities compared to nonmetals, and their electronegativities are comparable to those of other metals. Therefore, high electronegativity is not a characteristic of transition metals.

Question 16

1s²2s²2p⁶3s²3p⁶4s²3d² is the correct electron configuration for which of the following atoms? A)Ti B)Ca C)Ge D)Zr E)none of these

Accepted Answer

The electron configuration given is for the element titanium (Ti).

Question 17

Fe has __________ that is(are)unpaired in its d orbitals.
A)3 electrons
B)4 electrons
C)1 electron
D)2 electrons
E)5 electrons

Accepted Answer

Iron (Fe) in its ground state has the electron configuration [Ar] 3d^6 4s^2. In the 3d subshell, there are 4 unpaired electrons.

Question 18

An element with the electron configuration [Xe]6s²4f¹⁴5d⁷ would belong to which class on the periodic table? A)rare-earth elements B)transition elements C)alkaline-earth elements D)halogens E)none of the above

Accepted Answer

The electron configuration [Xe]6s²4f¹⁴5d⁷ indicates that the element is in the d-block, specifically in the transition metals, as it has electrons in the 5d subshell.

Question 19

Ti has __________ in its d orbitals.
A)1 electron
B)2 electrons
C)3 electrons
D)4 electrons
E)none of these

Accepted Answer

Titanium (Ti) has an electron configuration of [Ar] 3d² 4s², meaning it has 2 electrons in its d orbitals.

Question 20

What is the maximum oxidation number for titanium?
A)5
B)2
C)4
D)3
E)6

Accepted Answer

The maximum oxidation number for titanium is +4, as seen in compounds like titanium dioxide (TiO2).

Quiz 22: The Transition Elements and Coordination Compounds

Which of the following statements is incorrect concerning the 3d,4d,and 5d transition series?

What is the maximum oxidation state for niobium,Nb?

What is the maximum oxidation state expected for manganese?

In which compound is cobalt in the highest oxidation state?

Which of the following first-row transition elements is not able to have a +3 oxidation state?

A property that many representative nonmetals and many transition elements share is that they both have

The oxidation number of which of the following elements is often +2 but can be as great as +7?

In which of the following compounds is the metal atom not in a common oxidation state?

Which of the following is not a transition-metal?

What is the maximum oxidation state for rhenium,Re?

All of the following elements have the oxidation states listed except

Which of the following is not a characteristic property of transition-element compounds?

Transition metals can be distinguished from main-group metals by the fact that

The phenomenon called __________ contraction is responsible for the great similarity in atomic size and chemistry of 4d and 5d elements.

Which of the following is not a characteristic of the transition metals?

1s²2s²2p⁶3s²3p⁶4s²3d² is the correct electron configuration for which of the following atoms?

Fe has __________ that is(are) unpaired in its d orbitals.

An element with the electron configuration [Xe]6s²4f¹⁴5d⁷ would belong to which class on the periodic table?

Ti has __________ in its d orbitals.

What is the maximum oxidation number for titanium?