Bonding Review

What is a valence electron?

• The sum of neutrons and protons.
• The # of electrons in the last shell.
• A type of bond.
• A popular compound.

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Ionic bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

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Atoms are most stable when their outer shell is complete.

• true
• false

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NGSS.HS-PS1-1

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How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

Why do elements bond?

• To be friends
• To create a new element
• To become stable

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Anions

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

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NGSS.HS-PS1-1

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Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

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Which of the following is the correct ionic formula for calcium sulfide?

• Ca₂S₂

• CaS

• S₂Ca₂

• SCa

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NGSS.MS-PS1-1

Name the compound from it's formula: BaI₂

• Iodine barium

• Iodine bariumide

• Barium iodine

• Barium iodide

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NGSS.MS-PS1-1

If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?

• O^-10

• O⁺⁸

• O^-2

• O⁺¹⁰