What is an ion?

• A type of proton

• A molecule made of two atoms

• An atom or group of atoms with a positive or negative charge

• An atom or group of atoms with a neutral charge

How do metal atoms form ions?

• By losing protons

• By sharing electrons

• By losing electrons

• By gaining electrons

What charge do ions formed from metal atoms have?

• Variable

• Neutral

• Positive

• Negative

How do non-metal atoms form ions?

• By losing electrons

• By gaining protons

• By sharing electrons

• By gaining electrons

What charge do ions formed from non-metal atoms have?

• Positive

• Neutral

• Negative

• Variable

For elements in groups 1, 2, and 3, how many electrons are lost when forming ions?

• Two electrons

• The same as their group number

• One electron

• The same as their period number

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NGSS.HS-PS1-1

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Why are ions formed from metal atoms positive?

• They have more electrons than protons

• They have more neutrons than protons

• They have an equal number of protons and electrons

• They have more protons than electrons

What is the electronic structure of ions formed from non-metal atoms?

• Similar to a metal

• Similar to a noble gas

• Similar to a halogen

• Similar to a transition metal

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

For elements in groups 6 and 7, how is the charge on the ion determined?

• Group number divided by 8

• 8 plus group number

• Group number minus 8

• 8 minus group number

What happens to the outer shell of non-metal atoms when they form ions?

• It loses electrons

• It gains electrons

• It remains unchanged

• It becomes unstable

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NGSS.HS-PS1-1