Deck 11: Chemical Bonds: the Formation of Compounds From Atoms

Question 1

How many valence electrons are present in an atom of lithium in the ground state?

A)1
B)2
C)3
D)7

Answer 1

1

Question 2

Atoms of the metallic elements generally form ions by

A)gaining electrons,forming positive ions.
B)gaining electrons,forming negative ions.
C)losing electrons,forming positive ions.
D)losing electrons,forming negative ions.

Answer 2

losing electrons,forming positive ions.

Question 3

What is the total number of electrons present in a ion?

A)10
B)8
C)6
D)9

Answer 3

10

Question 4

Which of the following statements is true for most atoms?

A)In general,as the atomic radius increases,the first ionization energy increases.
B)In general,as the atomic radius increases,the first ionization energy decreases.
C)In general,as the first ionization energy decreases,the electronegativity increases.
D)No correct answer is given.

Question 5

As one progresses left to right across a period on the periodic table,first ionization energy generally

A)increases.
B)decreases.
C)remains the same.

Question 6

Which of the following pairs is incorrectly matched?

Question 7

As one descends a group on the periodic table,atomic radius generally

A)increases.
B)decreases.
C)remains the same.

Question 8

What is the total number of electrons present in a Ca⁺² ion?

A)2
B)18
C)20
D)22

Question 9

Which structure represents the best Lewis structure for O₂?

A)
B)
C)
D)

Question 10

As one descends a group on the periodic table,first ionization energy generally

A)increases.
B)decreases.
C)remains the same.

Question 11

When potassium fluoride forms from a potassium atom and a fluorine atom

A)a proton is transferred from the potassium atom to the fluorine atom.
B)a proton is transferred from the fluorine atom to the potassium atom.
C)an electron is transferred from the potassium atom to the fluorine atom.
D)an electron is transferred from the fluorine atom to the potassium atom.

Question 12

What is the total number of electrons present in a ion?

A)8
B)10
C)2
D)6

Question 13

What is the total number of electrons present in a Na⁺¹ ion?

A)6
B)11
C)12
D)10

Question 14

Atoms of the nonmetallic elements generally form ions by

A)gaining electrons,forming positive ions.
B)gaining electrons,forming negative ions.
C)losing electrons,forming positive ions.
D)losing electrons,forming negative ions.

Question 15

As one progresses left to right across a period on the periodic table,atomic radius generally

A)increases.
B)decreases.
C)remains the same.

Question 16

Which of the following statements is false?

A)In order for a covalent bond to form,the atomic orbitals of the atoms must overlap.
B)The most common ions for the representative elements can be predicted based on their tendency to attain the same electron configuration of the closest noble gas.
C)Ionization energies show a large decrease when electrons are removed from a noble gas-like configuration.
D)Ionic compounds exist as large aggregates of positive and negative ions.

Question 17

Choose the best Lewis structure for .

A)[ ]^-
B)[ ]^-
C)[ ]^-
D)[ ]^-

Question 18

How many valence electrons are present in an atom of bromine in the ground state?

A)1
B)2
C)3
D)7

Question 19

Which element forms an ion that is larger than its atom?

A)Lithium
B)Calcium
C)Chromium
D)Cluorine

Question 20

How many valence electrons are present in an atom of magnesium in the ground state?

A)1
B)2
C)7
D)8

Question 21

Which type of chemical bond involves the unequal sharing of electrons?

A)Ionic
B)Polar covalent
C)Nonpolar covalent

Question 22

Which type of chemical bond involves the transfer of electrons?

A)Ionic
B)Polar covalent
C)Nonpolar covalent

Question 23

Elements of Group 6A generally form ions with a charge of

A)+1
B)+2
C)-1
D)-2

Question 24

What is the empirical formula of sodium oxide?

A)NaO
B)NaO₂
C)Na₂O
D)Na₂O₂

Question 25

As one descends a group on the periodic table,electronegativity generally

A)increases.
B)decreases.
C)remains the same.

Question 26

Which element forms an ion that is smaller than its atom?

A)Strontium
B)Sulfur
C)Oxygen
D)Fluorine

Question 27

Halogens generally form ions with a charge of

A)+1
B)+2
C)-1
D)-2

Question 28

What is the empirical formula of calcium oxide?

A)CaO
B)Ca₂O
C)CaO₂
D)CaO₃

Question 29

What is the empirical formula of barium nitride?

A)BaN
B)Ba₃N
C)Ba₂N₃
D)Ba₃N₂

Question 30

A Cl^-1 ion has an electron configuration similar to that of

A)neon.
B)argon.
C)krypton.
D)xenon.

Question 31

As one progresses left to right across a period on the periodic table,electronegativity generally

A)increases.
B)decreases.
C)remains the same.

Question 32

A bond that is principally ionic will form between

A)sulfur and hydrogen.
B)phosphorus and sulfur.
C)chlorine and iodine.
D)potassium and fluorine.

Question 33

A bond that is principally covalent will form between

A)potassium and oxygen.
B)fluorine and oxygen.
C)sodium and chlorine.
D)aluminum and fluorine.

Question 34

What is the empirical formula of lithium nitride?

A)LiN
B)Li₃N
C)LiN₃
D)Li₂N

Question 35

A Ca⁺² ion has an electron configuration similar to that of

A)neon.
B)argon.
C)krypton.
D)xenon.

Question 36

Alkaline earth metals generally form ions with a charge of

A)+1
B)+2
C)-1
D)-2

Question 37

Alkali metals generally form ions with a charge of

A)+1
B)+2
C)-1
D)-2

Question 38

What is the empirical formula of aluminum oxide?

A)AlO
B)Al₂O₃
C)Al₃O₂
D)AlO₃

Question 39

A bond that is principally ionic will form between

A)magnesium and chlorine.
B)silicon and phosphorus.
C)selenium and oxygen.
D)oxygen and nitrogen.

Question 40

Which type of chemical bond involves the equal sharing of electrons?

A)Ionic
B)Polar covalent
C)Nonpolar covalent

Question 41

In any period,the highest electronegativity is found in a

A)metal.
B)nonmetal.
C)metalloid.

Question 42

What is the number of valence electrons in a molecule of ammonia?

A)3
B)24
C)6
D)8

Question 43

The shape of a water molecule is

A)bent.
B)pyramidal.
C)tetrahedral.
D)linear.

Question 44

A bond that is principally covalent will form between

A)calcium and oxygen.
B)rubidium and chlorine.
C)lithium and chlorine.
D)sulfur and oxygen.

Question 45

As the difference in electronegativity between two atoms increases,the percent of ionic character of a bond between those two atoms

A)increases.
B)decreases.
C)remains the same.

Question 46

An ionic bond will form between which two atoms?

A)Potassium and chlorine
B)Hydrogen and oxygen
C)Chlorine and chlorine
D)Carbon and oxygen

Question 47

The atomic radius generally decreases as we move from left to right across a period because

A)the number of electrons in the atoms decreases from left to right.
B)the number of protons in the nucleus increases from left to right.
C)the sizes of the orbitals in the energy level decreases as we move from left to right.
D)the number of neutrons in the nucleus remains almost constant as we move from left.to right

Question 48

A Lewis electron dot symbol shows

A)all the electrons in the ground-state of an atom.
B)all the core electrons in the ground-state of an atom.
C)all the valence electrons in the ground-state of an atom.
D)all the electrons in the outermost sublevel in an atom.

Question 49

The shape of a carbon dioxide molecule is

A)bent.
B)linear.
C)trigonal planar.
D)tetrahedral.

Question 50

What is the number of valence electrons in a chlorine atom in the ground state?

A)1
B)2
C)5
D)7

Question 51

A nonpolar covalent bond will form between which two atoms?

A)Potassium and chlorine
B)Hydrogen and chlorine
C)Sodium and bromine
D)Chlorine and chlorine

Question 52

Which is a nonpolar molecule?

A)CH₄
B)KCl
C)HCl
D)H₂O

Question 53

What is the number of valence electrons in a molecule of carbon dioxide?

A)24
B)16
C)10
D)12

Question 54

As the difference in electronegativity between two atoms increases,the polarity of a bond between those two atoms

A)increases.
B)decreases.
C)remains the same.

Question 55

What is the number of valence electrons in an aluminum atom in the ground state?

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

Question 56

Which is a nonpolar molecule?

A)H₂S
B)CO₂
C)HF
D)NH₃

Question 57

The shape of an ammonia molecule is

A)bent.
B)trigonal planar.
C)pyramidal.
D)linear.

Question 58

Which contains both ionic and covalent bonds?

A)(KCl)
B)(NH₃ )
C)(KNO₃)
D)([NO₂]^-1)

Question 59

The shape of a boron trifluoride molecule is

A)pyramidal.
B)trigonal planar.
C)tetrahedral.
D)linear.

Question 60

A polar covalent bond will form between which two atoms?

A)Beryllium and fluorine
B)Hydrogen and chlorine
C)Sodium and oxygen
D)Fluorine and fluorine

Question 61

Covalent bonds will most likely form between

A)two atoms with a high ionization energy.
B)two atoms with a low ionization energy.
C)an atom with a high ionization energy and an atom with a low ionization energy.
D)no correct answer is given.

Question 62

Which of the following does not have a noble gas electron configuration?

A)S^-2
B)Al⁺³
C)Sb⁺⁵
D)Ar

Question 63

Which of the following characterizes covalent bonding?

A)The formation of ions
B)The type of bond normally found between metals and nonmetals
C)The loss of electrons
D)The formation of true,discrete molecules

Question 64

The molecular shape shown in the following figure is

A)tetrahedral.
B)trigonal pyramidal.
C)bent.
D)trigonal planar.

Question 65

Which does not represent the correct formula for a compound of magnesium?

A)MgCl₂
B)Mg₂S
C)MgO
D)Mg₃N₂

Question 66

Which atom has the largest radius?

A)Se
B)Te
C)O
D)S

Question 67

The shape of a carbon tetrachloride molecule is

A)pyramidal.
B)trigonal planar.
C)bent.
D)tetrahedral.

Question 68

In the following molecular shape,the angle is

A)180°
B)120°
C)90°
D)109.5°

Question 69

Which atom has four valence electrons?

A)Be
B)F
C)Ge
D)Te

Question 70

Which compound contains a triple bond in its Lewis structure?

A)CO
B)SO₂
C)H₂S
D)

Question 71

Which does not have a noble gas electron configuration?

A)Sc⁺³
B)Ar
C)O^-2
D)K

Question 72

The total number of valence electrons in a nitrate ion is

A)22
B)23
C)24
D)56

Question 73

Carbon dioxide is a nonpolar molecule because

A)oxygen is more electronegative than carbon.
B)the two oxygen atoms are bonded to the carbon atom.
C)the individual dipoles of the carbon-oxygen bonds are oriented 180° to each other.
D)the carbon-oxygen bonds are polar covalent.

Question 74

Ionic bonds will most likely form between

A)two atoms with a high ionization energy.
B)two atoms with a low ionization energy.
C)an atom with a high ionization energy and an atom with a low ionization energy.
D)no correct answer is given.

Question 75

The molecular shape shown in the following figure is

A)tetrahedral.
B)trigonal pyramidal.
C)bent.
D)trigonal planar.

Question 76

Which series is ranked in order of increasing electronegativity?

A)O,S,Se,Te
B)Cl,S,P,Si
C)Sr,Sn,N,O
D)C,Si,P,Se

Question 77

To break a covalent bond,energy must be

A)released.
B)absorbed.
C)both,absorbed and released.
D)neither,absorbed nor released.

Question 78

Which compound has double covalent bonds within its molecular structure?

A)NaCl
B)CO₂
C)CH₄
D)H₂O

Question 79

Which atom has the largest radius?

A)Mg
B)Si
C)S
D)Cl

Question 80

Which of the following does not contain a polar covalent bond?

A)CH₄
B)H₂O
C)CH₃OH
D)Cl₂