Ions and Isotopes

Negative ions are called

• Cations
• Electrons
• Anions
• Neutrons

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

• positive
• negative
• neutral
• polyatomic

Positive ions form when atoms _________ valence electrons.

• lose
• gain
• share
• gain or share

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

What charge does an atom have if it LOSES an electron? 

• Positive (+)
• Negative (-)

When an atom LOSES an electron it is a

• cation
• anion

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

A negative ion is a 

• cation
• anion

Valence electrons are: 

• Electrons farthest away from the nucleus
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom

What charge does an atom have if it GAINS an electrons?

• Positive (+)
• Negative (-)