What is a solid?

• particles that are tightly compacted

• particles that are not tightly compacted

what is a gas?

• a substance or matter in a state in which it will expand freely to fill the whole of a container

• the basic unit of a chemical element

• an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Molecules are always moving no matter what phase they are in: solid, liquid, gas.

• True

• False

What happens to molecules when the temperature drops or lowers?

• The molecules get closer together

• The molecules start moving faster.

• The molecules stop moving.

• The molecules become smaller.

The attraction between particles is greatest in

• solid

• liquid

• gas

• plasma

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

• high melting point
• soft
• malleable
• liquid at room temperature

Ionic compounds conduct electricity when dissolved in water. Which statement below best explains the property?

• Ions are free to move.

• Electrons are free to move.

• Bonds are strong.

• There are weak intermolecular forces of attraction.

Why are ionic bonds solid?

• they are made of metals

• every negative is attracted to every positive

• they have high melting point

• they are not, sometimes they are liquid

When salt dissolves it water it's state is

• still solid

• liquid

• gas

• depends on temp

The positive ions tend to _____________ electrons.

• lose

• gain