Unit 3 - Ions and Ionic Compounds

Cations are

• positive

• negative

• on the right side of the periodic table.

• nonmetals

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

• positive
• negative
• neutral
• polyatomic

An electron has what kind of charge?

• no charge
• positive 
• negative
• it depends

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Atoms that have gained & lost electrons are called _________

• ions

• isotopes

• radioactive

• corrosive

Atoms are most stable when their outer shell is filled with electrons.

• true
• false

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The force of attraction between two oppositely charged ions

• ionic bond
• strong force
• positive/negative force

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Oxygen becomes an anion by _______ electrons.

• losing
• gaining
• sharing
• exciting

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Sodium loses an electron to become a ___________?

• neutral atom
• anion
• onion
• cation

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When the number of electrons equals the number of protons the atom has what charge?

• sponge bob
• positive charge
• negative charge
• neutral charge

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An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

• Gain 5
• Lose 3
• Nothing

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