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

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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

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

• positive
• negative
• neutral
• polyatomic

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Negative ions form when atoms _________ valence electrons.

• lose
• gain
• share

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The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

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NGSS.MS-PS1-1

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

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NGSS.HS-PS1-8

Which particles change the charge in atoms when ions are formed?

• Protons
• Electrons
• Neutrons
• Kittens

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Where are metals located on the periodic table?

• Blue
• Green
• Red

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NGSS.HS-PS1-1

Where are the nonmetals located on the periodic table? 

• Blue
• Red
• Green

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