Question 1

Boron nitride, BN, is a new high-tech material. According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about boron nitride? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Accepted Answer

The answer of Boron nitride, BN, is a new high-tech...

Question 2

Identify the molecular geometry of the nitrate ion, $$\mathrm { NO } _ {\bar{ 3 }}$$ 
, and the hybridization of the N atomic orbitals.

Accepted Answer

The answer of Identify the molecular geometry of the nitrate...

Question 3

Which of the following molecules has a bond order that is less than one?

Accepted Answer

He₂^- has a bond order of 1/2.

Question 4

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Accepted Answer

The molecule described in choice C, N₂²^-, is paramagnetic because it has an odd number of electrons in its molecular orbitals. Specifically, it has an unpaired electron in the pi* anti-bonding orbital. All of the other molecules described in the diagram have an even number of electrons in their molecular orbitals and are therefore diamagnetic.

Question 5

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the magnetic properties of the oxygen molecule O₂ and the peroxide anion O₂²^-.

Accepted Answer

According to molecular orbital theory, the oxygen molecule has two unpaired electrons in its highest energy level, making it paramagnetic. Similarly, the peroxide anion also has two unpaired electrons in its highest energy level, making it also paramagnetic. Therefore, the correct choice is B, where oxygen is predicted to be paramagnetic and peroxide is predicted to be paramagnetic.

Question 6

Using the energy-level diagram below, determine the bond order of the PO molecule.

Accepted Answer

The answer of Using the energy-level diagram below, determine the...

Question 7

According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about NO, NO⁺, and NO^-? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Accepted Answer

The answer of According to the molecular orbital energy-level diagram...

Question 8

Of the following molecules (O₃, SCl₂, SO₂, CS₂, and CO₂), which ones do you predict to have a bond angle of 180°?

Accepted Answer

The answer of Of the following molecules (O₃, SCl₂, SO₂,...

Question 9

Use MO theory to predict the bond orders of the following molecular ions. Which one do you predict does not exist?

Accepted Answer

The answer of Use MO theory to predict the bond...

Question 10

Which of the following molecules is paramagnetic?

Accepted Answer

Oxygen (O2) is paramagnetic because it has two unpaired electrons in its molecular orbital configuration, which leads to a net magnetic moment.

Question 11

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the bond order of the oxygen molecule O₂ and the peroxide anion O₂²^-.

Accepted Answer

Oxygen (O2) has a bond order of 2, calculated as (10-6)/2 = 2. The peroxide anion (O2^2-) has a bond order of 1, calculated as (10-8)/2 = 1.

Question 12

Which one of the following species has four electrons in antibonding pi molecular orbitals?

Accepted Answer

The answer of Which one of the following species has...

Question 13

Predict the bond order of the NO⁺ molecular ion.

Accepted Answer

To determine the bond order, we need to first calculate the number of electrons in bonding and antibonding orbitals. The molecular orbital diagram for NO⁺ is: NOS: σ(2p) --> bonding orbital (4 electrons) ^{: σ*(2p) --> antibonding orbital (2 electrons)}: σ(2p) --> bonding orbital (4 electrons) Bond order = (number of bonding electrons - number of antibonding electrons) / 2 Bond order = (4+4-2) / 2 = 3. Therefore, the bond order is 3, which corresponds to choice C.

Question 14

Which of the following molecules is paramagnetic?

Accepted Answer

The answer of Which of the following molecules is paramagnetic?
...

Question 15

Boron nitride is being investigated in frontier research directed at producing novel electronic devices. If you used the following energy-level diagram for the molecular orbitals of boron nitride, BN, what would you predict? These molecular orbitals are formed from the 2s and 2p atomic orbitals. I. Boron nitride is diamagnetic. II) Boron nitride has a bond order of 2. III) Boron nitride is paramagnetic. IV) The bond in BN^- is stronger than the bond in BN.

Accepted Answer

The answer of Boron nitride is being investigated in frontier...

Question 16

Predict the bond order of the NO^- molecular ion.

Accepted Answer

To determine the bond order, we need to first calculate the number of electrons in bonding and antibonding orbitals. The molecular orbital diagram for NO⁺ is: NOS: σ(2p) --> bonding orbital (4 electrons) ^{: σ*(2p) --> antibonding orbital (2 electrons)}: σ(2p) --> bonding orbital (4 electrons) Bond order = (number of bonding electrons - number of antibonding electrons) / 2 Bond order = (4+4-2) / 2 = 3. Therefore, the bond order is 3, which corresponds to choice C.

Question 17

Identify the molecular geometry of the molecular anion, SF₅^-, and the hybridization of the S atomic orbitals.

Accepted Answer

The answer of Identify the molecular geometry of the molecular...

Question 18

For which one of the following molecules (BF₃, CF₄, NF₃, OF₂, XeF₄) is the electron geometry tetrahedral and the molecular geometry triangular pyramidal? Draw its Lewis structure with the correct bond angles.

Accepted Answer

The answer of For which one of the following molecules...

Question 19

Which one of the following molecules has a bond order of 3?

Accepted Answer

N2 (Nitrogen molecule) has a bond order of 3, which is the highest bond order among the given options, indicating a triple bond between the two nitrogen atoms.

Question 20

Oxygen has two common molecular anions: peroxide (O₂²^-) and superoxide (O₂^-). Use the MO energy level diagram below to identify which one of the following statements is not correct. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Accepted Answer

The answer of Oxygen has two common molecular anions: peroxide...

Quiz 9: Molecular Geometry: Shape Determines Function

Boron nitride, BN, is a new high-tech material. According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about boron nitride? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Identify the molecular geometry of the nitrate ion, $\mathrm { NO } _ {\bar{ 3 }}$ , and the hybridization of the N atomic orbitals.

Which of the following molecules has a bond order that is less than one?

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the magnetic properties of the oxygen molecule O₂ and the peroxide anion O₂²^-.

Using the energy-level diagram below, determine the bond order of the PO molecule.

According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about NO, NO⁺, and NO^-? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Of the following molecules (O₃, SCl₂, SO₂, CS₂, and CO₂), which ones do you predict to have a bond angle of 180°?

Use MO theory to predict the bond orders of the following molecular ions. Which one do you predict does not exist?

Which of the following molecules is paramagnetic?

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the bond order of the oxygen molecule O₂ and the peroxide anion O₂²^-.

Which one of the following species has four electrons in antibonding pi molecular orbitals?

Predict the bond order of the NO⁺ molecular ion.

Which of the following molecules is paramagnetic?

Predict the bond order of the NO^- molecular ion.

Identify the molecular geometry of the molecular anion, SF₅^-, and the hybridization of the S atomic orbitals.

For which one of the following molecules (BF₃, CF₄, NF₃, OF₂, XeF₄) is the electron geometry tetrahedral and the molecular geometry triangular pyramidal? Draw its Lewis structure with the correct bond angles.

Which one of the following molecules has a bond order of 3?

Oxygen has two common molecular anions: peroxide (O₂²^-) and superoxide (O₂^-) . Use the MO energy level diagram below to identify which one of the following statements is not correct. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Quiz 9: Molecular Geometry: Shape Determines Function

Boron nitride, BN, is a new high-tech material. According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about boron nitride? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Identify the molecular geometry of the nitrate ion, NO3ˉ\mathrm { NO } _ {\bar{ 3 }}NO3ˉ​ , and the hybridization of the N atomic orbitals.

Which of the following molecules has a bond order that is less than one?

Which one of the following molecules is paramagnetic? These molecules are described by the MO energy diagram below. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the magnetic properties of the oxygen molecule O2 and the peroxide anion O22-.

Using the energy-level diagram below, determine the bond order of the PO molecule.

According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about NO, NO+, and NO-? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Of the following molecules (O3, SCl2, SO2, CS2, and CO2), which ones do you predict to have a bond angle of 180°?

Use MO theory to predict the bond orders of the following molecular ions. Which one do you predict does not exist?

Which of the following molecules is paramagnetic?

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the bond order of the oxygen molecule O2 and the peroxide anion O22-.

Which one of the following species has four electrons in antibonding pi molecular orbitals?

Predict the bond order of the NO+ molecular ion.

Which of the following molecules is paramagnetic?

Predict the bond order of the NO- molecular ion.

Identify the molecular geometry of the molecular anion, SF5-, and the hybridization of the S atomic orbitals.

For which one of the following molecules (BF3, CF4, NF3, OF2, XeF4) is the electron geometry tetrahedral and the molecular geometry triangular pyramidal? Draw its Lewis structure with the correct bond angles.

Which one of the following molecules has a bond order of 3?

Oxygen has two common molecular anions: peroxide (O22-) and superoxide (O2-) . Use the MO energy level diagram below to identify which one of the following statements is not correct. These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Identify the molecular geometry of the nitrate ion, $\mathrm { NO } _ {\bar{ 3 }}$ , and the hybridization of the N atomic orbitals.

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the magnetic properties of the oxygen molecule O₂ and the peroxide anion O₂²^-.

According to the molecular orbital energy-level diagram below, which one of the following statements is not correct about NO, NO⁺, and NO^-? These molecular orbitals are formed from the 2s and 2p atomic orbitals.

Of the following molecules (O₃, SCl₂, SO₂, CS₂, and CO₂), which ones do you predict to have a bond angle of 180°?

Use energy levels of diatomic molecules derived from molecular orbital theory to predict the bond order of the oxygen molecule O₂ and the peroxide anion O₂²^-.

Predict the bond order of the NO⁺ molecular ion.

Predict the bond order of the NO^- molecular ion.

Identify the molecular geometry of the molecular anion, SF₅^-, and the hybridization of the S atomic orbitals.

For which one of the following molecules (BF₃, CF₄, NF₃, OF₂, XeF₄) is the electron geometry tetrahedral and the molecular geometry triangular pyramidal? Draw its Lewis structure with the correct bond angles.

Oxygen has two common molecular anions: peroxide (O₂²^-) and superoxide (O₂^-) . Use the MO energy level diagram below to identify which one of the following statements is not correct. These molecular orbitals are formed from the 2s and 2p atomic orbitals.