Unit 6

ALL

100

Which of the following groups contain three elements with stable electron configurations?

a. lithium, krypton, argon     b. argon, neon, barium

c. xenon, neon, boron            d. helium, xenon, neon

d. helium, xenon, neon

200

Ionization energies tend to

• decrease from left to right across a period.
• increase from the top of a group to the bottom.
• increase from left to right across a period.
• decrease from the bottom of a group to the top.

• increase from left to right across a period.

300

The formation of an ionic bond involves the

• transfer of electrons.      b. transfer of neutrons.

c. transfer of protons.        d. sharing of electrons.

transfer of electrons.

400

Which of the following statements correctly describes the substance with the formula KI?

• Molecules of potassium iodide contain one atom of potassium and one atom of iodine.
• There is a one-to-one ratio of potassium ions to iodide ions.
• Potassium iodide is a molecular compound.
• Potassium iodide is a polyatomic ion.

• There is a one-to-one ratio of potassium ions to iodide ions.

500

Which statement best describes the properties of sodium chloride?

• Sodium chloride is a malleable solid.
• Solid sodium chloride is a good conductor of electric current.
• Sodium chloride has a low melting point.
• Liquid sodium chloride is a good conductor of electric current.

• Liquid sodium chloride is a good conductor of electric current.

THE

100

When two atoms of the same nonmetal react, they often form a(an)

• ionic bond.                     b. polyatomic ion.

c. diatomic molecule.        d. polar molecule.

c. diatomic molecule.

200

In a polar covalent bond,

• electrons are shared equally between atoms.
• a cation is bonded to an anion.
• electrons are transferred between atoms.
• electrons are not shared equally between atoms.

• electrons are not shared equally between atoms.

300

Because water molecules are polar and carbon dioxide molecules are nonpolar,

• water has a lower boiling point than carbon dioxide does.
• attractions between water molecules are weaker than attractions between carbon dioxide molecules.
• carbon dioxide cannot exist as a solid.
• water has a higher boiling point than carbon dioxide does.

• water has a higher boiling point than carbon dioxide does.

400

Fluorine, F, forms a binary ionic compound with lithium, Li.

What is the name of this compound?

• fluorine lithide               b. lithium fluoride

c. lithium fluorine              d. fluorine lithium

 b. lithium fluoride

500

If copper(II) appears in the name of a compound, it indicates that the compound contains

• copper ions with a 11+ charge.
• copper ions with a 2+ charge.
• copper ions with a negative charge.
• two types of copper ions.

• copper ions with a 2+ charge.

SAME

100

Beryllium, Be, and chlorine, Cl, form a binary ionic compound with a one-to-two ratio of beryllium ions to chloride ions. The formula for the compound is

• Be2Cl.                              b. 2BeCl.

c. BeCl2.                              d. Be2Cl2.

c. BeCl2.  

200

Metallic bonding is similar to ionic bonding because

• electrons are transferred between atoms.
• electrons are shared between atoms.
• the lattice that forms contains anions and cations.
• there is an attraction between positively charged and negatively charged particles.

• there is an attraction between positively charged and negatively charged particles.

300

Many metals can be drawn into thin wires without breaking because

• cations are still surrounded by electrons when they shift their positions in the lattice.
• metals generally have low melting points.
• when a metal is struck with a hammer, the positions of the anions do not change.
• electrons have fixed positions in a metallic lattice.

• cations are still surrounded by electrons when they shift their positions in the lattice.

400

How does increasing the amount of carbon in steel affect its properties?

• Carbon makes the lattice harder and stronger.
• Carbon forms an oxide that protects the steel from rusting.
• Carbon makes the steel light enough to use for airplane parts.
• Carbon makes the steel softer and easier to cut.

• Carbon makes the lattice harder and stronger.

500

Typically, atoms gain or lose electrons to achieve

• an exchange of energy.
• ionization.
• a stable electron configuration.
• vaporization.

• a stable electron configuration.

UNIT

100

In an electron dot diagram, the symbol for an element is used to represent

• the nucleus.
• the nucleus and all electrons.
• the nucleus and valence electrons.
• the nucleus and all nonvalence electrons.

• the nucleus and all nonvalence electrons.

200

In the compound MgCl2, the subscript 2 indicates that

• there are two magnesium ions for each ion of chlorine.
• the chloride ion is twice the size of the magnesium ion.
• magnesium and chlorine form a double covalent bond.
• there are two chloride ions for each magnesium ion.

• there are two chloride ions for each magnesium ion.

300

Which of the following is a typical property of an ionic compound?

• low melting point
• poor conductor of electric current when melted
• tendency to shatter when struck
• all of the above

• tendency to shatter when struck

400

Which of the following compounds does NOT contain molecules?

• H2                                    b. NaCl

c. CO2                                 d. H2O

b. NaCl

500

You see a structural formula in which the symbols for elements are connected by a long dash. You can assume that the chemical bonds in the compound are

a. ionic.                               b. covalent.

c. metallic.                          d. unstable.

b. covalent.

CATEGORIES

100

The water molecule H2O is polar because it contains two polar single bonds and

• its molecule has a linear shape.
• molecules that contain polar bonds are always polar.
• its molecule has a bent shape.
• the attractions between water molecules are strong.

• its molecule has a bent shape.

200

Water has a higher boiling point than expected because

• there is so much water vapor in the atmosphere.
• water molecules are not very massive.
• hydrogen and oxygen form single covalent bonds.
• of the strong attractions between polar water molecules.

• of the strong attractions between polar water molecules.

300

The elements most likely to form more than one type of ion are the

• transition metals.           b. alkali metals.

c. halogens.                        d. alkaline earth metals.

transition metals.  

400

Which of the following statements about ions is true?

• All metals form more than one type of ion.
• Many transition metals can form more than one type of ion.
• Halogens form more than one type of ion.
• Alkali metals form more than one type of ion.

• Many transition metals can form more than one type of ion.

500

In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains

• two carbon atoms.         b. two oxygen atoms.

c. a polyatomic ion.           d. an ionic bond.

 b. two oxygen atoms.