Covalent 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

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

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

Which of the following describes the strength of a covalent bond?

• Middle - Each atom shares an octet
• Middle - One atom gains an octet & the other loses.
• Weakest - it only forms because of another bond forming
• Strongest - each atom receives a "permanent" octet.

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NGSS.HS-PS1-3

NGSS.HS-PS1-4

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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NGSS.HS-PS1-3

Which of the following is NOT considered a diatomic element?

• Carbon
• Nitrogen
• Chlorine
• Iodine

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NGSS.HS-PS1-1

Diatomic elements are defined as IDENTICAL elements that bond with each other (i.e. Oxygen with Oxygen).  What type of bond should they form?

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

Diatomic elements are defined as IDENTICAL elements that bond with each other (i.e. Oxygen with Oxygen).  What do we call it when this forms?

• Compound
• Molecule
• Atom
• None of the above

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NGSS.MS-PS1-1

Ammonia is a very commonly used covalent compound. It's scientific name is nitrogen trihydride. What is the chemical formula for ammonia?

• HN₄

• NH₃

• H₃N

• NH₄