Question 1

Which molecule has the largest dipole moment?
A)HF
B)HI
C)HBr
D)HCl
E)All of the molecules have the same dipole moment.

Accepted Answer

The dipole moment depends on the difference in electronegativity between the atoms and the distance between them. In HF, the difference in electronegativity between H and F is the highest, and the bond length is the shortest among the given molecules, resulting in the highest dipole moment.

Question 2

Select the compound with the highest (i.e.,most negative)lattice energy.
A)CaS(s)
B)BaO(s)
C)NaI(s)
D)LiBr(s)
E)MgO(s)

Accepted Answer

Lattice energy is directly proportional to the charges of the ions and inversely proportional to the distance between them. Therefore, the compound with the greatest charge and smallest ion size will have the highest lattice energy. Mg and O have charges of +2 and -2, respectively, while the ionic radii of Mg and O are relatively small. Therefore, MgO has the highest lattice energy of the given compounds.

Question 3

Which of the following is a covalent compound? A)Na₂O B)CaCl₂ C)Cl₂O D)CsCl E)Al₂O₃

Accepted Answer

Covalent compounds are formed when two nonmetals bond and share electrons. In option C, we can see Cl and O, which are both nonmetals, and the chemical formula indicates that they share electrons. All the other options involve a metal and a nonmetal bonding, which forms an ionic compound.

Question 4

What types of elements undergo ionic bonding?
A)two metals
B)a nonmetal and a metal
C)two nonmetals
D)two Group 1A elements
E)two noble gases

Accepted Answer

Ionic bonding occurs between a nonmetal and a metal, where the nonmetal gains electrons and the metal loses electrons to form positively and negatively charged ions, respectively.

Question 5

Which of these compounds is most likely to be covalent? A)Rb₂S B)SrCl₂ C)CS₂ D)CaO E)MgI₂

Accepted Answer

Covalent compounds typically involve nonmetals bonding with other nonmetals. Choice C contains only nonmetals (C and S) and is therefore the most likely to be covalent. Choices A, B, D, and E involve metal and nonmetal combinations, which are more likely to be ionic compounds.

Question 6

The Lewis structure for a chlorate ion,ClO₃^-,should show ____ single bond(s),____ double bond(s),and ____ lone pair(s). A)2,1,10 B)3,0,9 C)2,1,8 D)3,0,10 E)2,1,9

Accepted Answer

The answer of The Lewis structure for a chlorate ion,ClO₃^-,should...

Question 7

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s).What does the symbol represent?
A)Electron configuration
B)Valence electrons
C)Atomic number
D)Atomic mass
E)Nucleus and core electrons

Accepted Answer

The answer of The Lewis dot symbol consists of the...

Question 8

The lattice energy for ionic crystals increases as the charge on the ions _____________ and the size of the ions __________________ .
A)increases,increases
B)increases,decreases
C)decreases,increases
D)decreases,decreases
E)None of these is generally correct.

Accepted Answer

The lattice energy is directly proportional to the charge on the ions and inversely proportional to the size of the ions. As the charge on the ions increases, the attraction between them becomes stronger, resulting in a higher lattice energy. As the size of the ions decreases, the distance between them becomes smaller, resulting in a stronger attraction and thus a higher lattice energy. Therefore, as the charge on the ions increases and the size of the ions decreases, the lattice energy increases, which is consistent with choice B.

Question 9

Which of these compounds is most likely to be covalent? A)KF B)CaCl₂ C)SF₄ D)Al₂O₃ E)CaSO₄

Accepted Answer

Covalent compounds typically involve two nonmetals or a metalloid and a nonmetal, and SF4 is a compound between a nonmetal (S) and a metalloid (F). The other choices involve an ionic bond between a metal and a nonmetal, which is typically stronger than a covalent bond.

Question 10

Which of these Lewis structures is incorrect?
A) 
B) 
C) 
D) 
E)

Accepted Answer

The answer of Which of these Lewis structures is incorrect?
A)...

Question 11

Select the compound with the lowest (i.e.,least negative)lattice energy.
A)CsBr(s)
B)NaCl(s)
C)SrO(s)
D)CaO(s)
E)KBr(s)

Accepted Answer

CsBr has the lowest lattice energy because lattice energy decreases as the size of the ions increases and Cs+ and Br- are larger ions compared to those in the other options.

Question 12

Which of the following contains ionic bonding? A)CO B)SrF₂ C)Al D)OCl₂ E)HCl

Accepted Answer

The answer of Which of the following contains ionic bonding? A)CO B)SrF₂ C)Al D)OCl₂ E)HCl...

Question 13

Which of these ionic solids would have the largest lattice energy? A)NaCl B)NaF C)CaBr₂ D)CsI E)CaCl₂

Accepted Answer

The answer of Which of these ionic solids would have...

Question 14

Which of these ionic solids would have the largest lattice energy? A)SrO B)NaF C)CaBr₂ D)CsI E)BaSO₄

Accepted Answer

SrO has the largest lattice energy because it involves the interaction between ions with +2 and -2 charges, leading to stronger electrostatic attraction compared to the other options which involve ions with lower charges or larger ionic sizes that result in weaker attractions.

Question 15

What types of elements undergo covalent bonding?
A)a metal and a noble gas
B)a nonmetal and a metal
C)two nonmetals
D)two Group 1A elements
E)an actinide

Accepted Answer

Covalent bonding occurs between two nonmetals, as they share electrons to achieve a stable octet.

Question 16

How many lone pairs of electrons need to be added to complete this Lewis structure? 
A)5
B)8
C)6
D)1
E)16

Accepted Answer

The answer of How many lone pairs of electrons need...

Question 17

Which of the following contains covalent bonds?
A)BaO
B)IBr
C)Mg
D)LiBr
E)Cu

Accepted Answer

IBr (iodine monobromide) contains a covalent bond, which is a chemical bond that involves the sharing of electron pairs between atoms. This is typical for molecules formed between nonmetals, such as iodine (I) and bromine (Br), both of which are halogens.

Question 18

The total number of bonding electrons in a molecule of formaldehyde (H₂CO)is A)3. B)4. C)6. D)8. E)18.

Accepted Answer

Formaldehyde has the molecular formula H₂CO. The Lewis structure of formaldehyde shows one carbon atom in the center and one oxygen atom and one hydrogen atom on either side of the carbon atom. Each of these atoms is surrounded by a valence shell that has four electrons. In the Lewis structure, carbon is double-bonded to oxygen, which makes two bonding pairs of electrons. Carbon is also single-bonded to hydrogen, which makes one bonding pair of electrons. This gives a total of three bonding pairs of electrons in formaldehyde. Since each bond in a molecule has two electrons, the total number of bonding electrons in formaldehyde is 3 × 2 = 6. In addition to these six bonding electrons, formaldehyde has four lone pairs of electrons (two on oxygen and one on each hydrogen), making a total of ten valence electrons in the molecule. Therefore, the correct answer is D) 8.

Question 19

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s).What does the dot or dots represent?
A)Electron configuration
B)Valence electrons
C)Atomic number
D)Atomic mass
E)Core electrons

Accepted Answer

The dots in a Lewis dot symbol represent the valence electrons of an atom.

Question 20

Which of these compounds is most likely to be covalent? A)CsOH B)NF₃ C)Sr(NO₃)₂ D)CaO E)LiF

Accepted Answer

Covalent compounds typically have long and complex molecular formulas with multiple elements bonded together. Choice B fits this description with its lengthy and complicated formula. The other choices are all composed of a metal and a nonmetal, indicating an ionic bond, which typically results in simpler formulas.

Quiz 8: Chemical Bonding I Basic Concepts

Which molecule has the largest dipole moment?

Select the compound with the highest (i.e.,most negative) lattice energy.

Which of the following is a covalent compound?

What types of elements undergo ionic bonding?

Which of these compounds is most likely to be covalent?

The Lewis structure for a chlorate ion,ClO₃^-,should show single bond(s) , double bond(s) ,and lone pair(s) .

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the symbol represent?

The lattice energy for ionic crystals increases as the charge on the ions _ and the size of the ions ______ .

Which of these compounds is most likely to be covalent?

Which of these Lewis structures is incorrect?

Select the compound with the lowest (i.e.,least negative) lattice energy.

Which of the following contains ionic bonding?

Which of these ionic solids would have the largest lattice energy?

Which of these ionic solids would have the largest lattice energy?

What types of elements undergo covalent bonding?

How many lone pairs of electrons need to be added to complete this Lewis structure?

Which of the following contains covalent bonds?

The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the dot or dots represent?

Which of these compounds is most likely to be covalent?

Quiz 8: Chemical Bonding I Basic Concepts

Which molecule has the largest dipole moment?

Select the compound with the highest (i.e.,most negative) lattice energy.

Which of the following is a covalent compound?

What types of elements undergo ionic bonding?

Which of these compounds is most likely to be covalent?

The Lewis structure for a chlorate ion,ClO3-,should show ____ single bond(s) ,____ double bond(s) ,and ____ lone pair(s) .

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the symbol represent?

The lattice energy for ionic crystals increases as the charge on the ions _____________ and the size of the ions __________________ .

Which of these compounds is most likely to be covalent?

Which of these Lewis structures is incorrect?

Select the compound with the lowest (i.e.,least negative) lattice energy.

Which of the following contains ionic bonding?

Which of these ionic solids would have the largest lattice energy?

Which of these ionic solids would have the largest lattice energy?

What types of elements undergo covalent bonding?

How many lone pairs of electrons need to be added to complete this Lewis structure?

Which of the following contains covalent bonds?

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s) .What does the dot or dots represent?

Which of these compounds is most likely to be covalent?

The Lewis structure for a chlorate ion,ClO₃^-,should show single bond(s) , double bond(s) ,and lone pair(s) .

The lattice energy for ionic crystals increases as the charge on the ions _ and the size of the ions ______ .

The total number of bonding electrons in a molecule of formaldehyde (H₂CO) is