Deck 5: Compounds and Their Bonds

Question 1

To form an ion, a sodium atom

A) gains one electron.
B) gains two electrons.
C) loses seven electrons.
D) loses one electron.
E) loses two electrons.

Answer 1

loses one electron.

Question 2

The number of electrons in an ion with 20 protons and an ionic charge of 2⁺ is

A) 24.
B) 22.
C) 20.
D) 18.
E) 16.

Answer 2

18.

Question 3

Which of the following represents the correct electron-dot structure for Cl?

A)
B)
C) ${ \mathrm { Cl } } \cdot$
D)
E)

Answer 3

Question 4

The number of electrons in the highest energy level of carbon is

A) one.
B) two.
C) three.
D) four.
E) five.

Question 5

The number of valence electrons found in an atom of a Group A element is equal to

A) its atomic number.
B) its mass number.
C) its group number.
D) eight.
E) eight minus the group number.

Question 6

How many electrons will aluminum gain or lose when it forms an ion?

A) lose 1
B) gain 5
C) lose 2
D) lose 3
E) gain 1

Question 7

Which of the following is the correct electron-dot structure for carbon?

A) $: \ddot { c }$
B)
C)
D)
E) $\cdot \ddot { \mathrm { C } } \cdot$

Question 8

What is the ionic charge of an ion with 13 protons and 10 electrons?

A) 1+
B) 2+
C) 3+
D) 2-
E) 3-

Question 9

How many valence electrons are in the electron-dot structures for the elements in group 3A(13)?

A) 1
B) 2
C) 3
D) 4
E) 6

Question 10

Elements in group 2A(2) of the periodic table form ions with a charge of

A) 1+ .
B) 1- .
C) 2+ .
D) 3+.
E) 0.

Question 11

The ion of aluminum is

A) Al⁺.
B) Al₂⁺.
C) Al₃⁺.
D) Al₃^-.
E) Al₂^-.

Question 12

The number of electrons in the highest energy level of nitrogen is

A) one.
B) two.
C) three.
D) four.
E) five.

Question 13

What is the correct formula for the oxide ion?

A) O₂-
B) O-
C) O+
D) O₂+
E) O₃+

Question 14

In ionic compounds, __________ lose their valence electrons to form positively charged __________.

A) metals; anions
B) nonmetals; cations
C) metals; polyatomic ions
D) nonmetals; anions
E) metals; cations

Question 15

An anion always

A) has a positive charge.
B) contains a group of two or more atoms with a positive charge.
C) contains a metal and a nonmetal.
D) forms covalent bonds.
E) has a negative charge.

Question 16

Valence electrons are electrons located

A) in the outermost energy level of an atom.
B) in the nucleus of an atom.
C) in the innermost energy level of an atom.
D) throughout the atom.
E) in the first three shells of an atom.

Question 17

The octet rule indicates that

A) all of the noble gases have eight total electrons.
B) all of the shells in an atom hold a maximum of 8 electrons.
C) all of the Group A elements have 8 valence electrons.
D) atoms lose, gain, or share valence electrons to have 8 valence electrons.
E) the noble gases react with other compounds to get 8 valence electrons.

Question 18

How many electrons will chlorine gain or lose when it forms an ion?

A) lose 1
B) gain 1
C) lose 7
D) gain 2
E) lose 3

Question 19

What is the symbol for the ion with 19 protons and 18 electrons?

A) F+
B) F-
C) Ar+
D) K-
E) K+

Question 20

In an electron-dot structure of an element, the dots are used to represent

A) all of the electrons in the atom.
B) the valence electrons.
C) the electron arrangement.
D) only the electrons that will participate in bond formation.
E) the electrons that the element will gain when it forms a compound.

Question 21

Which of the following polyatomic ions has a 3- ionic charge?

A) hydroxide
B) nitrate
C) sulfate
D) phosphate
E) bicarbonate

Question 22

What is the formula for aluminum nitrite?

A) Al2NO₂
B) AlNO₃
C) Al(NO₂)3
D) Al2(NO₃)3
E) Al2(NO₂)₂

Question 23

Which one of the following elements forms two or more ions with different ionic charges?

A) K
B) F
C) Ca
D) O
E) Fe

Question 24

Fe2(SO₄)3 is called

A) iron sulfate.
B) iron (II) sulfate.
C) iron (III) sulfate.
D) diiron trisulfate.
E) iron trisulfate.

Question 25

In a molecule with covalent bonding,

A) oppositely charged ions are held together by strong electrical attractions.
B) atoms of metals form bonds to atoms of nonmetals.
C) atoms of different metals form bonds.
D) atoms are held together by sharing electrons.
E) atoms of noble gases are held together by attractions between oppositely charged ions.

Question 26

A(n) __________ is the smallest neutral unit of two or more atoms held together by a covalent bond.

A) ionic compound
B) nucleus
C) molecule
D) formula
E) unit

Question 27

What is the correct formula for iron (III) sulfide?

A) Fe2S2
B) Fe2S
C) FeS
D) FeS2
E) Fe2S3

Question 28

The correct formula for the compound formed from Mg and S is

A) MgS.
B) MgS₂.
C) Mg₂S.
D) Mg₂S₂.
E) Mg₂S₃.

Question 29

The compound MgCl₂ is named

A) magnesium chlorine.
B) magnesium dichloride.
C) magnesium (II) chloride.
D) magnesium chloride.
E) dimagnesium chloride.

Question 30

The name of Al₂(SO₄)₃ is

A) aluminum(III) sulfate.
B) dialuminum trisulfate.
C) dialuminum sulfate.
D) dialuminum trisulfide.
E) aluminum sulfate.

Question 31

Which one of the following compounds contains an ion with a 3+ charge?

A) KCl
B) Na2O
C) FeCl3
D) CuCl
E) MgCl₂

Question 32

The name of the HSO₄- ion is

A) sulfate.
B) hydrogen sulfate.
C) sulfite.
D) hydrogen sulfite.
E) sulfide.

Question 33

An ionic compound

A) has a net positive charge.
B) has a net negative charge.
C) contains only cations.
D) contains only anions.
E) has a net charge of zero.

Question 34

What is the correct formula for the iron (II) ion?

A) Fe+
B) Fe2+
C) Fe3+
D) Fe2-
E) Fe3-

Question 35

What is the formula of the nitride ion?

A) N3-
B) NO₂-
C) NO₃3-
D) NO₃2-
E) NO₃-

Question 36

A group of covalently bonded atoms that has an overall electrical charge is called a(n)

A) ionic compound.
B) anion.
C) polyatomic ion.
D) cation.
E) molecule.

Question 37

The name of the Cu⁺ ion is

A) copper (II).
B) copper (I).
C) cobalt.
D) copper.
E) cuprum.

Question 38

What is the formula of a compound that contains Na+ and PO₄3- ions?

A) Na3PO₄
B) NaPO₄
C) Na2PO₃
D) Na3PO₃
E) Na3P

Question 39

Which of the following polyatomic ions has a positive charge?

A) hydroxide
B) sulfate
C) hydrogen carbonate
D) ammonium
E) nitrate

Question 40

The correct formula for a compound formed from the elements Al and O is

A) AlO.
B) Al₂O.
C) Al₃O₂.
D) AlO₃ .
E) Al₂O₃ .

Question 41

Which of the following elements has the lowest electronegativity?

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

Question 42

Double and triple bonds form because

A) the atoms involved have high electronegativities.
B) single covalent bonds do not give all of the atoms in the molecule eight valence electrons.
C) one of the atoms in the molecule has more than eight valence electrons.
D) the ions involved have charges larger than one.
E) there is at least one hydrogen atom involved in the bond.

Question 43

Ionic bonding is expected in which of these compounds?

A) Cl₂
B) KF
C) OF2
D) HF
E) H₂

Question 44

The correct name of the compound NCl3 is

A) nitrogen chloride.
B) trinitrogen chloride
C) nitrogen(III) chloride.
D) nickel chloride.
E) nitrogen trichloride.

Question 45

Choose the best electron-dot structure for OCl₂.

A)
B)
C)
D)
E)

Question 46

If the electronegativity difference between elements X and Y is 2.1, the bond between the elements X-Y is

A) ionic.
B) nonpolar ionic.
C) nonpolar covalent.
D) polar covalent.
E) impossible.

Question 47

What is the formula of carbon tetraiodide?

A) CI
B) CI4
C) C4I
D) CI3
E) C2I4

Question 48

How many valence electrons are in the electron-dot structure of H₂O?

A) 2
B) 4
C) 6
D) 8
E) 10

Question 49

Which of the following substances contains a nonpolar covalent bond?

A) H₂O
B) NaCl
C) NH3
D) MgF2
E) N₂

Question 50

The correct name for the compound N₂O₃ is

A) nitrogen oxide.
B) nitrogen trioxide.
C) dinitride trioxide.
D) dinitrogen oxide.
E) dinitrogen trioxide.

Question 51

The formula for a molecule formed from N and Cl would be

A) NCl.
B) NCl₂.
C) NCl3.
D) N₃Cl.
E) NCl₅.

Question 52

Which of the following compounds contains a polar covalent bond?

A) NaF
B) HCl
C) Br₂
D) MgO
E) O₂

Question 53

In a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal to the number of electrons

A) in the atom.
B) in its nucleus.
C) in all the atoms.
D) in its ion.
E) needed to give it a stable electron configuration

Question 54

The ability of an atom to attract the shared electrons in a covalent bond is its

A) electronegativity.
B) bonding ability.
C) polarity.
D) ionic character.
E) nonpolarity.

Question 55

The types of compounds that use prefixes in their names are

A) ionic compounds.
B) ionic compounds involving transition metals.
C) polyatomic ions.
D) covalent compounds.
E) compounds that contain polyatomic ions.

Question 56

Which of the following compounds contains an ionic bond?

A) NH3
B) H₂O
C) CaO
D) H₂
E) CH4

Question 57

Choose the best electron-dot structure for CH₂Cl₂.

A)
B)
C)
D)
E)

Question 58

Which of the following elements does NOT exist as a diatomic molecule?

A) hydrogen
B) nitrogen
C) chlorine
D) oxygen
E) carbon

Question 59

How many lone pairs of electrons are in the electron-dot structure of H₂O?

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

Question 60

How many valence electrons are in the electron-dot structure of CCl4?

A) 0
B) 82
C) 6
D) 8
E) 32

Question 61

The strongest interactions between molecules of hydrogen ( H₂ ) are

A) ionic bonds.
B) hydrogen bonds.
C) polar covalent.
D) dipole-dipole.
E) dispersion forces.

Question 62

Identify each of the following molecules as polar or nonpolar.
carbon tetrachloride

Question 63

The shape of the water molecule (H₂O) is

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

Question 64

The carbon tetrachloride molecule, CCl₄, has the shape of a

A) tetrahedron.
B) square.
C) cube.
D) circle.
E) sphere.

Question 65

Identify each of the following molecules as polar or nonpolar.
carbon dioxide

Question 66

The VSEPR theory allows us to determine the most favorable

A) shape of a molecule.
B) charge on an ion.
C) color of a compound.
D) bond type for a molecule.
E) formula for a compound.

Question 67

The ammonia molecule ( NH₃ ) is

A) a polar molecule with polar bonds.
B) a nonpolar molecule with polar bonds.
C) a nonpolar molecule with nonpolar bonds.
D) a polar molecule with nonpolar bonds.
E) a polar molecule with ionic bonds.

Question 68

Identify each of the following molecules as polar or nonpolar.
hydrogen sulfide

Question 69

The water molecule has a dipole with the negative portion

A) localized between the hydrogen atoms.
B) pointing toward the oxygen atom.
C) localized on one of the hydrogens.
D) pointing from the oxygen through the hydrogen atoms.
E) surrounding the molecule.

Question 70

The main interactions between molecules of iodine I2 are examples of

A) ionic bonds.
B) covalent bonds.
C) hydrogen bonds.
D) dipole-dipole interactions.
E) dispersion forces.

Question 71

The shape of the carbon dioxide (CO₂) is

A) linear.
B) square.
C) pyramidal.
D) hexagonal.
E) bent.

Question 72

Identify each of the following molecules as polar or nonpolar.
water

Question 73

A polar covalent bond is found in which of these compounds?

A) H₂O
B) F2
C) NaCl
D) H₂
E) N₂

Question 74

The shape of the ammonia molecule (NH₃) is

A) linear.
B) square.
C) pyramidal.
D) hexagonal.
E) octagonal.

Question 75

The bond in Cl₂ is a(n)

A) ionic bond.
B) nonpolar covalent bond.
C) metallic bond.
D) polar ionic bond.
E) no bond.

Question 76

The strongest interactions between molecules of ammonia ( NH₃ ) are

A) ionic bonds.
B) hydrogen bonds.
C) polar covalent.
D) dipole-dipole.
E) dispersion forces.

Question 77

The shape of the carbon tetrachloride molecule is

A) linear.
B) square.
C) pyramidal.
D) tetrahedral.
E) octagonal.

Question 78

The strongest interactions between molecules of hydrogen chloride are

A) ionic bonds.
B) covalent bonds.
C) hydrogen bonds.
D) dipole-dipole interactions.
E) dispersion forces.

Question 79

The carbon tetrachloride molecule, CCl₄, is

A) a polar molecule with polar bonds.
B) a nonpolar molecule with polar bonds.
C) a nonpolar molecule with nonpolar bonds.
D) a polar molecule with nonpolar bonds.
E) a polar molecule with ionic bonds.

Question 80

Hydrogen sulfide, H₂S, has a shape similar to

A) carbon dioxide.
B) carbon monoxide.
C) hydrogen chloride.
D) water.
E) carbon tetrachloride.