Chapter 6

Chemical Bonds

100

Which group of elements are unlikely to form chemical bonds based on their electron configuration?

Noble Gases

200

A __________________ is a group of atoms that are joined together by one or more covalent bonds.

molecule

300

What is an electron dot diagram?

visual model of an atom where each dot represents a valence electron

400

Which types of elements are involved in:

ionic bonds

covalent bonds

metallic bonds

ionic = metal-nonmetal

covalent = nonmetal-nonmetal

metallic = metal-metal

500

What happens to the ionization energy of elements as you move to the right of the periodic table? As you move down the table?

generally increases move to the right

generally decreases move down

Ionic

100

What happens in order to form an ionic bond?

Transfer of electrons from cation to anion

200

Which of the following is a true statement for the properties of ionic compounds:

A) Good conductor when solid

B) Malleable

C)Good Conductor when liquid

D)Low Melting Point

C)Good Conductor when liquid

300

When an ionic bond forms between Magnesium and Chlorine, it forms the compound Magnesium Chloride (MgCl₂).

What will be the charges of the Mg ion and the Cl ion?

Mg = 2+

Cl = 1-

400

Name the following ionic compounds: (*some may need roman numeral)

1) NaCl

2) FeO

3) Ca₃N₂

1) Sodium Chloride

2) Iron(II) Oxide

3) Calcium Nitride

500

Write the chemical formula for the following ionic compounds:

1) Potassium Iodide

2) Mercury (I) Oxide

3) Aluminum Sulfide

1) KI

2) Hg₂O

3) Al₂S₃

Covalent

100

How is a covalent bond formed?

Electrons are shared between two nonmetals

200

How many electrons are shared in a...

Single bond

Double Bond

Triple Bond

Single bond = 2

Double Bond = 4

Triple Bond = 6

300

What is a polar covalent bond?

Bond that forms as a result of the unequal sharing of electrons.

400

Write down the names of the following covalent molecules:

1) H₂O

2) CH₄

3) N₂O₅

1) H₂O = Dihydrogen Monoxide

2) CH₄ = Carbon Tetrahydride

3) N₂O₅ = Dinitrogen Pentoxide

500

Draw the structural formula for CO₂

Double bonds (two lines) connecting each oxygen to the center carbon

Metallic

100

A mixture of elements that have metallic properties. Must contain at least one metal atom.

Alloy

200

Name an example of an alloy

Brass

Bronze

Stainless Steel

Steel

Sterling Silver

Cast Iron

300

What does the "sea of electrons" mean in a metallic bond.

Delocalized electrons surround metal cations in a metallic bond.

400

Name 3 physical properties of metallic compounds.

good conductors of heat/electricity

malleable/ductile

high melting points

500

Knowing how metallic bonds form, explain how/why iron will have a higher melting point and is stronger than lithium.

Iron has more valence electrons than lithium, which means there are more electrons contributed to the "sea" of electrons in the bond.

Mystery

100

Draw an electron dot diagram for:

1) Calcium

2) Sulfur

3) Argon

Calcium = 2 dots (2 v.e)

Sulfur = 6 dots (6 v.e)

Argon = 8 dots (8 v.e)

200

What do we call the structure of ionic and metallic compounds?

crystal lattice

300

Given an example of a diatomic molecule

***Any covalent compound containing only 2 atoms.

O₂

N₂

CO

HCl

etc.

400

The ions Na¹⁺ and F^1- will both have the same electron configuration of which element?

Neon

500

How can you tell if a molecule is polar or nonpolar by looking at the shape of the molecule?

Polar molecules are bent due to the unequal sharing of electrons.

Nonpolar molecules are linear in shape