Chapter 20 (Hall, Sydney)

Positive ions form when atoms _________ valence electrons.

• lose
• gain
• share
• gain or share

What types of charges attract?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Positive and Negative

Electric charges that are alike _______ each other.

• Attract
• Repel

The accumulation of excess electric charge on an object is called

• Static electricity 
• Electric discharge
• Resistance
• Circuit 

Walking across a carpet is an example of charge being transferred by

• friction.
• induction.
• contact.
• static electricity

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

When an atom loses a valence electron, it becomes a(n) _____________ ion.

• positive
• negative
• neutral
• polyatomic

Which is most likely to form a negative ion?

• an element from group 17
• a metal
• an element from group 1
• an element with atoms that have eight valence electrons

A positive ion is called a

• cation
• anion

The teacher rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.
• The balloons will attract each other.
• The balloons will become positively (+) charged.
• The balloons will pop.