2A: Ionic and Covalent bonds

AKS 2a: Ionic vs. Covalent Properties

​Ionic compounds have very strong bonds. This causes ionic compounds to have high melting points and boiling points

​​Strong bonds

​Ionic compounds are made of ions. When you dissolve ionic compounds in water, the ions become mobile and can conduct an electric current

​​Conductive

​Ionic compounds have a crystal lattice structure and are generally solid at room temperature. Think about table salt!

​​Crystalline

IONIC COMPOUNDS

Covalent compounds have weaker bonds ionic compounds. This causes covalent compounds to have low melting points and low boiling points

​​Weak bonds

​Ionic compounds are not made of but are composed of atoms. When you dissolve covalent compounds in water they DO NOT dissociate into ions and therefore, do not conduct a current.

​​Conductive

​Covalent compounds have a Lewis Structures that show their arrangement. They are generally solids, liquids and gases and room temperature. If a solid then dull and brittle

COVALENT COMPOUNDS

Multiple Choice

What two types of atoms make a covalent bond?

• 2 Nonmetals

• 1 Metal and 1 Nonmetal

• 2 Metals

• 2 Noble Gases

Multiple Choice

Salt is an example of what?

• ionic compound

• covalent compound

Multiple Choice

The above atoms are sharing valence electrons, what type of bond is this?

• Ionic

• Covalent

• Hydrogen

• James

Multiple Choice

What type of elements form cations?

• metals

• nonmetals

• metalloids?

Multiple Choice

When atoms gain or lose electrons, they are called

• Isotopes

• Atoms

• Ions

• Electrons

Multiple Choice

Why do all bonds form?

• to fill the outermost energy level

• so an atom can be unstable

• so the number of protons and electrons can equal.

• so they can gain neutrons.

Multiple Choice

How are ionic bonds formed?

• transfer of electrons

• sharing of electrons

Multiple Choice

Which compound has high melting point?

• Ionic

• Covalent

Multiple Choice

Which of the following can conduct electricity in solid state?

• metals

• covalent compound

• ionic compound

Multiple Choice

Which compound can conduct electricity in molten and aqueous state?

• Ionic compound

• Covalent compound

Multiple Choice

Covalent bonds can be found as _______?

• only solids

• solids and liquids

• solids, liquids and gases

Multiple Choice

What is a property of covalent bonds?

• They are pretty

• They have a LOW melting point

• They can dissolve in water

Multiple Choice

What is a property of covalent bonds?

• They cannot be dissolved in water.

• They have a high melting point

• They are orange

Multiple Select

Choose the properties that describe ionic compounds. (Hint there are 3 three correct answers)

• high melting point

• low melting point

• solids

• dissolve in water

• bond between 2 nonmetals

Multiple Choice

Ionic or covalent?
Na  Br

• Ionic

• Covalent

Multiple Choice

Ionic or covalent?
K  Br

• Ionic

• Covalent

Multiple Choice

Ionic or covalent?
C  O

• Ionic

• Covalent