Covalent Bonding and Electron Dot Structures

Which is the correct molecular structure for carbon dioxide (CO₂)?

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Tags

NGSS.MS-PS1-1

What is the correct Lewis Dot Structure for ammonia NH₃?

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Tags

NGSS.HS-PS1-1

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons

• Inner shell electrons

• Mobile Electrons

• Electrons closest to the nucleus

Is this the correct Lewis Dot Structure for Boron?

• Yes

• No, missing electrons

• No, too many electrons

• No, dots are in wrong place.

What type of chemical bonds occurs when atoms share electrons?

Tags

NGSS.HS-PS1-1

How many pairs of valence electrons are being shared in a single water molecule?

• 0 pair - 0 valence electrons

• 1 pair - 2 valence electrons

• 2 pair - 4 valence electrons

• 3 pair - 6 valence electrons

Tags

NGSS.MS-PS1-1

Hydrogen has one valence electron and needs one more to become stable. Which of the atoms below is most likely to covalently bond with a single hydrogen atom?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.

• electrons are completely transferred between two atoms.

• pairs of electrons are shared between two atoms.

• ions are held together by opposite charges.

Tags

NGSS.HS-PS1-1

Covalent compounds

• contain a sea of electrons

• share electrons

• transfer electrons

• conduct electricity

Tags

NGSS.HS-PS1-1

This is the displayed formula for what covalent molecule?

• Water

• Chlorine

• Chloride

• Ethanol

Tags

NGSS.MS-PS1-1