Covalent and Ionic Bonds

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.

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NGSS.HS-PS1-2

Which of the following is NOT formed by a covalent bond?

• K₂S
• H₂O
• I₂
• CO₂

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

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NGSS.HS-PS1-1

What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?

• Ionic
• Polar Covalent
• Nonpolar Covalent
• Van der Waals Force

What type of bond is shown in this image?

• Ionic
• Polar Covalent
• Nonpolar Covalent
• Van der Waals Force

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In a(an) POLAR bond, one atom pulls on the shared electrons more than the other atom. 

• True
• False

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity

How many valence electrons does oxygen have?

• 2
• 3
• 6
• 4

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NGSS.HS-PS1-1

How many valence electrons does nitrogen have?

• 3
• 2
• 5
• 1

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NGSS.HS-PS1-1

How many valence electrons does hydrogen have?

• 4
• 3
• 2
• 1

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NGSS.HS-PS1-1