Deck 5: Chemical Bonding

Question 1

Which of these substances are ionic compounds?
I. NCl₃
II. MgF₂
III. AlBr₃
IV. CH₄

A) I and II
B) II and III
C) II and IV
D) II, III, and IV
E) I and IV

Answer 1

II and III

Question 2

An atom with two valence electrons will most likely _____.

A) lose two electrons to become negatively charged and combine with a cation
B) lose two electrons to become positively charged and combine with an anion
C) gain two electrons to become negatively charged and combine with a cation
D) gain two electrons to become positively charged and combine with an anion
E) gain two electrons to become positively charged and combine with a cation

Answer 2

lose two electrons to become positively charged and combine with an anion

Question 3

The total number of valence electrons in NO ₂ ⁻ is _____.

A) 16
B) 17
C) 18
D) 15
E) 19

Answer 3

18

Question 4

Which of these is the correct Lewis dot structure for sulfur?

A)
B)
C)
D)
E)

Question 5

Which of these substances are covalent compounds?
I. CaO
II. H₂0
III. PF₃
IV. CH₄

A) I and II
B) II and III
C) II and IV
D) II, III, and IV
E) I, II, and III

Question 6

Which of these is the correct Lewis dot structure for chlorine?

A)
B)
C)
D)
E)

Question 7

Which of these is the most likely identity of element A in the Lewis dot structure?
​

A) Ca
B) Li
C) Al
D) Cs
E) P

Question 8

How many valence electrons are present in the Lewis structure of NO ₃ ⁻ ?

A) 32
B) 30
C) 20
D) 22
E) 24

Question 9

Ionic bonds are formed when electrons are _____.

A) transferred from one atom to another
B) split into smaller units
C) shared between atoms
D) destroyed during bonding
E) transferred to a higher energy level

Question 10

Which of these is the correct Lewis dot structure for carbon monoxide?

A)
B)
C)
D)
E)

Question 11

Which of these is the correct formula for sodium phosphide?

A) NaP
B) NaP₂
C) Na₃P
D) NaP₃
E) Na₃P₂

Question 12

What does the V in VSEPR theory stand for?

A) Very
B) Variable
C) Valence
D) Vanadium
E) Volume

Question 13

Which of these is the most likely identity of element A in the Lewis dot structure?
​

A) Ca
B) K
C) N
D) Cl
E) O

Question 14

Which of these is the correct formula for aluminum oxide?

A) AlO
B) Al₂O
C) AlO₂
D) Al₂O₃
E) Al₂O₂

Question 15

Which of these theories is utilized in the prediction of molecular shapes?

A) Dalton's atomic theory
B) VSEPR theory
C) Bohr's atomic theory
D) Lewis theory of bonding
E) Einstein's theory of relativity

Question 16

Which of these will not form a positive ion in an ionic compound?

A) Ba
B) Rb
C) P
D) Sn
E) Mg

Question 17

Which of the following is true about sodium?

A) It is most stable as an atom.
B) It is most stable as a negatively charged ion.
C) It is most stable as a positively charged ion.
D) All forms of sodium are very stable.
E) All forms of sodium are very unstable.

Question 18

Covalent bonds are formed when electrons are _____.

A) transferred from one atom to another
B) split into smaller units
C) shared between atoms
D) destroyed during bonding
E) heated during bonding

Question 19

Which of these is not a fundamental postulate of Lewis theory?

A) Valence electrons are shared in covalent bonding.
B) The valence shell is involved in chemical bonding.
C) Atoms bond to achieve a more stable configuration.
D) Atoms bond to achieve an octet of electrons in the valence shell.
E) Valence electrons are shared between atoms to form ionic bonds.

Question 20

Which of these is the correct formula for strontium iodide?

A) SrI
B) SrI₂
C) Sr₂I
D) SrI₃
E) Sr₂I₂

Question 21

Which of these molecules contains a triple bond?

A) NH₃
B) OCl₂
C) C₂H₂
D) H₂O
E) MgO

Question 22

Which of these is the correct Lewis dot structure for nitrogen, N₂?

A)
B)
C)
D)
E)

Question 23

Which of the following is true about ozone?

A) Its Lewis structure is best represented by resonance structures.
B) It increases the amount of ultraviolet radiation reaching the Earth's surface.
C) It cannot be broken down by ultraviolet radiation.
D) Its chemical formula is O₂.
E) It contains triple bonds between oxygen atoms.

Question 24

Which of these molecules contains a triple bond?

A) PCl₃
B) N₂
C) SO₂
D) H₂O
E) CO₂

Question 25

Which of the following is the molecular  geometry of NH₃?

A) Tetrahedral
B) Bent
C) Trigonal pyramidal
D) Trigonal planar
E) Linear

Question 26

How many lone pairs of electrons are present around the central atom in CO₂?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 27

Which of these is the correct Lewis dot structure for sulfur trioxide?

A)
B)
C)
D)
E)

Question 28

How many lone pairs of electrons are present around the central atom in SO₂?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 29

Which of these molecules contains one double bond and one single bond?

A) PCl₃
B) NH₃
C) SO₂
D) H₂O
E) CO₂

Question 30

Barium fluoride is often used in glass manufacturing. Which of these is the correct formula and bonding type for barium fluoride?

A) BaF, ionic
B) BaF, covalent
C) BaF₂, ionic
D) BaF₂, covalent
E) Ba₂F, ionic

Question 31

How many bonding pairs of electrons are present around the central atom in CO₂?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 32

How many bonding pairs of electrons are present around the central atom in HCN?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 33

Which of these molecules will have a tetrahedral molecular geometry?

A) NH₃
B) N₂O
C) C₂H₂
D) CH₃Cl
E) MgO

Question 34

The molecular geometry of a two-atom molecule _____.

A) is always bent
B) is always tetrahedral
C) is always linear
D) depends on the atoms involved
E) depends on the type of bonding

Question 35

Identify the element X present in the third row of the periodic table that forms the following compound:
​

A) S
B) Cl
C) P
D) Si
E) Al

Question 36

Identify the element X present in the fourth row of the periodic table that forms the following ion:
​

A) Ge
B) As
C) Se
D) Kr
E) Br

Question 37

How many lone pairs of electrons are present around the central atom in PCl₃?

A) 0
B) 1
C) 2
D) 3
E) 20

Question 38

How many lone pairs of electrons are present around the central atom in CH₄?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 39

Which of these molecules contains two double bonds?

A) PCl₃
B) N₂
C) SO₂
D) H₂O
E) CO₂

Question 40

How many lone pairs of electrons are present around the central atom in H₂O?

A) 0
B) 1
C) 2
D) 3
E) 4

Question 41

Which of these is the correct molecular geometry of PCl₃?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal pyramidal
E) Bent

Question 42

Which of these molecules will have a tetrahedral electron geometry and a bent molecular geometry?

A) PCl₃
B) H₂O
C) C₂H₂
D) CH₃Cl
E) SO₂

Question 43

Which of these would be expected to have a trigonal planar electron geometry?
​

A) I and II
B) II and III
C) I, II, and III
D) I and III
E) I only

Question 44

Which of these molecules will have a tetrahedral electron geometry and a trigonal pyramidal molecular geometry?

A) NH ₃
B) H₂O
C) C₂H₂
D) CH₃Cl
E) SO₂

Question 45

Which of these molecules will have a linear electron geometry and a linear molecular geometry?

A) PCl₃
B) H₂O
C) CO₂
D) CH₃Cl
E) BF₃

Question 46

Which of these molecules will have a linear electron geometry and a trigonal pyramidal molecular geometry?

A) PCl₃
B) H₂O
C) C₂H₂
D) CH₃Cl
E) None of these

Question 47

Which of the following results in bent molecular geometry?

A) Four bonding groups and zero lone pair on the central atom
B) Two bonding groups and three lone pairs on the central atom
C) Two bonding groups and two lone pairs on the central atom
D) Two bonding groups and zero lone pair on the central atom
E) Three bonding groups and one lone pair on the central atom

Question 48

Which of these is the correct molecular geometry of BF₃?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal pyramidal
E) Bent

Question 49

Which of these molecules will have a tetrahedral electron geometry and a tetrahedral molecular geometry?

A) PCl₃
B) H₂O
C) C₂H₂
D) CH₃Cl
E) SO₂

Question 50

Which of these theories is utilized in the prediction of molecular polarity?

A) Dalton's theory
B) VSEPR theory
C) Bohr's atomic theory
D) Einstein's relativity theory
E) Lewis bonding theory

Question 51

Which of these molecules will have a trigonal planar electron geometry and a bent molecular geometry?

A) PCl₃
B) H₂O
C) C₂H₂
D) CH₃Cl
E) SO₂

Question 52

Electronegativity is _____.

A) the ability of an atom to form positively charged ions
B) the ability of an atom to form negatively charged ions
C) the ability of an atom to attract protons in a covalent bond
D) the ability of an atom to attract electrons in a covalent bond
E) the ability of an atom to remain neutral

Question 53

Which of the following molecular geometries can a molecule with a tetrahedral electron geometry possess?

A) Tetrahedral
B) Trigonal pyramidal
C) Bent
D) All of these
E) None of these

Question 54

Which of the following is the molecular geometry of  NH₄⁺?

A) Trigonal planar
B) Tetrahedral
C) Trigonal pyramidal
D) Bent
E) Linear

Question 55

The element with the highest electronegativity is _____.

A) fluorine
B) hydrogen
C) helium
D) neon
E) chlorine

Question 56

Which of these molecules will have a trigonal pyramidal molecular geometry?

A) PCl₃
B) N₂O
C) C₂H₂
D) CH₃Cl
E) SO₂

Question 57

Which of these is the correct molecular geometry of CO₂?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal pyramidal
E) Bent

Question 58

Which of the following is  the correct molecular geometry of CCl₄?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal pyramidal
E) Bent

Question 59

Which of these is the correct molecular geometry of SO₂?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal pyramidal
E) Bent

Question 60

Which of these would be expected to have a linear molecular geometry?
​

A) I and II
B) II and IV
C) I, II, and IV
D) I and III
E) IV only

Question 61

Which of the following is true of a nonpolar bond?

A) One side of a nonpolar bond is electron deficient.
B) A nonpolar bond is formed because of varying electronegativities in atoms.
C) A nonpolar bond has an uneven electron distribution.
D) Molecules in a nonpolar bond do not have a charge separation.
E) None of these

Question 62

Which of these are polar molecules with a tetrahedral electron geometry?
I. CO₂
II. H₂O
III. CH₃Cl
IV. SiH₄

A) I and IV
B) I and III
C) I, II, and III
D) III and IV
E) II and III

Question 63

List the elements Na, K, Al, Cl, and Cs in order of decreasing electronegativity (from greatest to least).

A) Na > Cl > Al > K > Cs
B) Cs > Na > K > Cl > Al
C) Cl > Na > Al > K > Cs
D) Cl > Al > Na > K > Cs
E) Na > Cs > K > Al > Cl

Question 64

Which of these elements has the lowest electronegativity?

A) Ca
B) N
C) Se
D) P
E) O

Question 65

Which of the following is true of electronegativity?

A) The elements at the bottom of the periodic table have greater electronegativity than the elements at the top of the table.
B) The elements in the same row of the periodic table have equal electronegativity.
C) The elements in the same column of the periodic table have equal electronegativity.
D) The elements to the right of the periodic table have greater electronegativity than the elements to the left of the table.
E) The elements in the periodic table are arranged in the decreasing order  of their electronegativity.

Question 66

Which of these elements has the highest electronegativity?

A) Ca
B) N
C) Se
D) P
E) O

Question 67

Which of these contain polar bonds but are nonpolar molecules?
I. NCl₃
II. H₂
III. CO₂
IV. BF₃

A) I and II
B) I and III
C) III and IV
D) II and III
E) I, III, and IV

Question 68

Which of the following is true according to the octet rule ?

A) A stable electron configuration usually involves eight electrons.
B) An atom must have eight protons.
C) All elements with an atomic number of eight and above are metals.
D) Eight electrons are transferred from one atom to another during ionic bonding.
E) Elements with less than eight electrons have a linear molecular geometry.

Question 69

Which of the following are polar molecules?
I. PCl₃
II. H₂O
III. CO₂
IV. BF₃

A) I and IV
B) I and II
C) I, II, and IV
D) II and III
E) II and IV

Question 70

The averaging of two identical Lewis structures is called _____.

A) reverberation
B) resonance
C) covalence
D) shaping
E) structuring

Question 71

_____ is based on the idea that the negative charges of bonding electrons and lone pair electrons in a molecule repel each other.

A) VSEPR theory
B) Dalton's theory
C) Bohr's atomic theory
D) Lewis bonding theory
E) Einstein's theory of relativity

Question 72

Of the bonds below, the most polar bond would be _____.

A) C − C
B) C − N
C) C − O
D) C − F
E) B − C

Question 73

Element A has an electronegativity of 0.8, and element B has an electronegativity of 2.0. Which statement best describes the bonding in A₃B?

A) The AB bond is largely covalent with a δ⁻ on A.
B) The AB bond is largely covalent with a δ ⁺ on A.
C) The compound is largely ionic with no polar bonds.
D) The compound is largely covalent with no polar bonds.
E) The question stem lacks sufficient information.

Question 74

Which of the following is true about a water molecule?

A) It is a nonpolar molecule.
B) It has a bent electron geometry.
C) It has a linear molecular geometry.
D) It has two lone pairs of electrons on the central atom.
E) It contains two double bonds.

Question 75

List the elements Li, K, Al, Br, and Cs in order of increasing electronegativity (from least to greatest).

A) Li < Cs < Al < K < Br
B) Cs < Li < K < Br < Al
C) Br < Li < Al < K < Cs
D) Br < Al < Li < K < Cs
E) Cs < K < Li < Al < Br

Question 76

A _____ is also called a dipole.

A) polar bond
B) nonpolar bond
C) ionic bond
D) covalent bond
E) metallic bond

Question 77

Which of these is a nonpolar molecule?

A) CO
B) H₂O
C) O₃
D) PCl₃
E) SO₃

Question 78

Which of the following molecules is nonpolar?

A) CO₂
B) N₂
C) CH₄
D) CCl₄
E) All of these

Question 79

NO ₂ ⁻ has _____ double bond(s), _____ single bond(s), _____ lone (nonbonding) pair(s) of electrons, and _____ resonance forms.

A) 2; 0; 8; 2
B) 1; 1; 8; 3
C) 1; 1; 6; 2
D) 0; 2; 10; 0
E) 2; 0; 12; 2