Covalent and Ionic Lewis

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

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

What is the correct Lewis Dot Structure for ammonia NH₃?

• 
• 
• 
• 

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

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

Metals and nonmetals form which kind of bond?

• Polar covalent
• Ionic
• Non-polar covalent
• Metallic

Tags

NGSS.HS-PS1-1

How strongly an atom attracts electrons towards itself in a bond is called...

• Ionization energy

• Electronegativity

• Electricity

• Nuclear force

What way does a dipole arrow point in a polar bond?

• Towards the MORE electronegative element.

• Towards the LESS electronegative element.

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-2

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1