Deck 12: Chemical Bonding

Question 1

Would CO₂ be classified as ionic or covalent?

Answer 1

covalent

Question 2

Would MgCl₂ be classified as ionic or covalent?

Answer 2

ionic

Question 3

Would CoCl₂ be classified as ionic or covalent?

Answer 3

ionic

Question 4

In general, a larger atom has a smaller electronegativity.

Question 5

Would K₂O be classified as ionic or covalent?

Question 6

Covalent bonding occurs when a metal reacts with a nonmetal.

Question 7

Which of the following bonds would be the most polar without being considered ionic?

A) Mg-O
B) C-O
C) O-O
D) Si-O
E) N-O

Question 8

Which of the following bonds would be the least polar yet still be considered polar covalent?

A) Mg-O
B) C-O
C) O-O
D) Si-O
E) N-O

Question 9

A bond is a force that holds groups of two or more atoms together and makes them function as a unit.

Question 10

The greater the difference in electronegativity between two bonded atoms, the more polar the bond.

Question 11

CH₄ has ionic bonds.

Question 12

Covalent bonding occurs when electrons are shared by nuclei.

Question 13

Consider the drawings below: Which of the following statements are true? I. The electrons in each molecule tend to be attracted to the most electronegative element.
II) Each molecular drawing follows the localized electron model.
III) Both HF and CO₂ are linear molecules and therefore nonpolar.
IV) The bond angles of NH₃ are slightly less than 109.5^o because the lone pair compresses the angles between the bonding pairs.

A) I, III, IV
B) I, II, IV
C) I, II, III
D) II, IV
E) All of the above statements (I - IV) are correct.

Question 14

Would OCl₂ be classified as ionic or covalent?

Question 15

Would NaBr be classified as ionic or covalent?

Question 16

N₂ is an example of a covalent bond.

Question 17

Rank the following bonds from least polar to most polar: Si-Cl P-Cl Mg-Cl S-Cl

A) S-Cl, P-Cl, Mg-Cl, Si-Cl
B) P-Cl, S-Cl, Si-Cl, Mg-Cl
C) Mg-Cl, Si-Cl, P-Cl, S-Cl
D) Mg-Cl, S-Cl, P-Cl, Si-Cl
E) S-Cl, P-Cl, Si-Cl, Mg-Cl

Question 18

Would NH₃ be classified as ionic or covalent?

Question 19

Would CH₄ be classified as ionic or covalent?

Question 20

Ionic bonding occurs between atoms with small differences in electronegativities.

Question 21

Which if the following compounds contains one or more covalent bonds?

A) CS₂
B) LiCl
C) Na₂O
D) CaCl₂
E) MgS

Question 22

Is the molecule S₈ nonpolar or polar?

Question 23

Draw the Lewis structures for the following compounds to assist you in answering this question. CBr₂H₂ BH₃ XeCl₄ SF₄ HCl
Which compound has a see-saw shape?

A) CBr₂H₂
B) BH₃
C) XeCl₄
D) SF₄
E) HCl

Question 24

The most electronegative element of those listed is

A) B
B) Ga
C) Tl
D) Al
E) In

Question 25

Would AlCl₃ be classified as ionic or covalent?

Question 26

Order the following bonds from the least polar to the most polar. N-O, Ca-O, C-O, O-O, Ni-O

A) O-O < N-O < C-O < Ca-O < Ni-O
B) O-O < C-O < N-O < Ni-O < Ca-O
C) Ca-O < Ni-O < C-O < N-O < O-O
D) O-O < N-O < C-O < Ni-O < Ca-O
E) Ni-O < Ca-O < C-O < N-O < O-O

Question 27

Which of the following elements has the lowest electronegativity?

A) Cs
B) Na
C) Be
D) S
E) Br

Question 28

Is the molecule CF₄ nonpolar or polar?

Question 29

Draw the Lewis structures for the following compounds to assist you in answering this question. CBr₂H₂ BH₃ XeCl₄ SF₄ HCl
Which compound has bond angles of 109.5° around the central atom?

A) CBr₂H₂
B) BH₃
C) XeCl₄
D) SF₄
E) HCl

Question 30

Which of the following contains only nonpolar bonds?

A) CH₄
B) HCl
C) H₂O
D) Mg₃N₂
E) Cl₂

Question 31

Draw the Lewis structures for the following compounds to assist you in answering this question. CBr₂H₂ BH₃ XeCl₄ SF₄ HCl
How many of the compounds are nonpolar?

A) 1
B) 2
C) 3
D) 4
E) 5

Question 32

Which of the following has only nonpolar covalent bonds?

A) N₂
B) CO
C) HI
D) CCl₄
E) NaCl

Question 33

Which of the following compounds contains an ionic bond?

A) HCl (g)
B) NaCl
C) CCl₄
D) SO₂
E) O₂

Question 34

Would SF₄ be classified as ionic or covalent?

Question 35

Which of the following has nonpolar bonds?

A) I₂
B) H₂S
C) OF₂
D) HF
E) All are nonpolar.

Question 36

The most electronegative element of those listed is

A) Zn
B) Si
C) Sr
D) Ba
E) Zr

Question 37

Is the molecule H₂S nonpolar or polar?

Question 38

Which of the following elements has the lowest electronegativity?

A) Sr
B) P
C) Mn
D) N
E) H

Question 39

Which of these elements has the highest electronegativity?

A) Y
B) I
C) Sb
D) Sr
E) In

Question 40

The least electronegative element of those listed is

A) O
B) Pb
C) Ba
D) Cu
E) Se

Question 41

Which of the following has the smallest radius?

A) S^2-
B) Cl^-
C) Ar
D) K⁺
E) Ca²⁺

Question 42

The electron configuration for Ca²⁺ is identical to that of

A) Ne
B) Kr
C) Ca
D) Ar

Question 43

The electron configuration for the bromide ion is identical to that of

A) Br
B) Kr
C) K
D) I^-
E) none of these

Question 44

One of the most important characteristics of the water molecule is its ______________, which allows it to surround and attract both positive and negative ions.

A) polarity
B) strength
C) magnetism
D) fluidity
E) stability

Question 45

A nitrogen atom needs to gain _____ electrons to achieve a noble gas configuration.

A) 3
B) 2
C) 4
D) 5
E) 1

Question 46

In ionic bonding

A) the electrons are shared between the atoms.
B) the process of forming an ionic bond is highly endothermic overall.
C) the bonding that occurs is usually between two nonmetal atoms.
D) a noble gas configuration is formed for each element or ion.
E) At least two of the above statements are correct.

Question 47

Which of the following atoms has the greatest electronegativity?

A) Na
B) Rb
C) Cl
D) Se

Question 48

When a molecule has a center of positive charge and a center of negative charge, it is said to have a ______________.

A) magnetic attraction
B) diatomic bond
C) double bond
D) polyatomic ion
E) dipole moment

Question 49

Which of the following species would be expected to have the lowest ionization energy?

A) Br^-
B) Kr
C) Se^2-
D) Sr²⁺
E) Rb⁺

Question 50

Which element or ion listed below has the electron configuration 1s²2s²2p⁶?

A) Na⁺
B) Al³⁺
C) F^-
D) Ne
E) all of these

Question 51

Which of the following has primarily ionic bonding?

A) N₂O₃
B) Na₂O
C) CO₂
D) CCl₄
E) none of these

Question 52

Which element or ion listed below has the electron configuration 1s²2s²2p⁶3s²3p⁶?

A) Cl
B) Br^-
C) Se
D) Ca²⁺
E) two of these

Question 53

Which of the following bonds does not have a dipole moment?

A) O-O
B) B-H
C) N-O
D) O-H
E) S-H

Question 54

The number of polar covalent bonds in OF₂ is

A) 2
B) 1
C) 3
D) 4
E) none of these

Question 55

Which of the following has the largest radius?

A) S^2-
B) Cl^-
C) Ar
D) K⁺
E) Ca²⁺

Question 56

Arrange the following elements in order of increasing electronegativity (from smallest to largest).

A) Li < C < N < F
B) C < N < F < Li
C) N < C < Li < F
D) C < F < Li < N
E) F < N < C < Li

Question 57

Which of the following ions has the same electron configuration as an argon atom?

A) Br^-
B) S^3-
C) P³⁺
D) K⁺
E) Ca⁺

Question 58

If atom X forms a diatomic molecule with itself, the bond is

A) ionic
B) polar covalent
C) nonpolar covalent
D) polar coordinate covalent
E) none of these

Question 59

The F^- and O^2- ions have the same electron configuration.

Question 60

The electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶ is the correct electron configuration for the most stable form of which ion?

A) the strontium ion
B) the calcium ion
C) the krypton ion
D) the barium ion
E) the xenon ion

Question 61

Draw the Lewis electron structure for the silicon atom.

Question 62

Draw the Lewis electron structure for the sulfide ion.

Question 63

The formula of the compound formed in the reaction between potassium and oxygen is

A) K₂O
B) KO₂
C) K₂O₃
D) KO
E) none of these

Question 64

Which element or ion listed below has the electron configuration 1s²2s²2p⁶3s²3p⁶?

A) Ca⁺
B) Na⁺
C) K⁺
D) Cl
E) none of these

Question 65

Which element or ion listed below has the electron configuration 1s²2s²2p⁶3s²3p⁶?

A) S
B) Ne
C) Cl
D) S^2-
E) none of these

Question 66

Write the electron configuration for Sr²⁺.

Question 67

Which one of the following species has the same electron configuration as an atom of argon?

A) S^-
B) Cl^2-
C) K
D) Ca²⁺
E) Kr

Question 68

Magnesium reacts with bromine to form

A) MgBr₂
B) MgBr
C) Mg₂Br
D) Mg₂Br₃
E) none of these

Question 69

Write the electron configuration for Br^-.

Question 70

Which of the following compounds is the product of the reaction Mg + O₂?

A) MgO
B) MgO₂
C) MgO₃
D) Mg₂O
E) Mg₂O₃

Question 71

Write the electron configuration for Cl^-.

Question 72

When they react chemically, the alkali metals (Group 1A)

A) gain 1 electron
B) gain 7 electrons
C) gain or lose 7 electrons
D) lose 1 electron

Question 73

Write the electron configuration for Al³⁺.

Question 74

Which element listed below has the electron configuration 1s²2s²2p⁶3s²3p² ?

A) Si
B) P
C) Ge
D) C
E) none of these

Question 75

Magnesium reacts with oxygen to form

A) MgO
B) MgO₂
C) Mg₂O
D) Mg₂O₃
E) none of these

Question 76

Which of the following is the product of the reaction Al + O₂?

A) AlO
B) AlO₂
C) AlO₃
D) Al₃O₂
E) Al₂O₃

Question 77

Complete the table by giving the predicted formulas of the compounds formed between the elements listed.
Br
S
Na
______________
______________
Mg
______________
______________
Al
______________
______________

Question 78

How many lone pairs of electrons are in the Lewis structure for compound, CH₄?

A) 0
B) 1
C) 2
D) 3
E) none of these

Question 79

Draw the Lewis electron structure for the chlorine atom.

Question 80

Draw the Lewis electron structure for the sulfur atom.