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

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-2

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

• 4
• 6
• 8
• 2

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

• A
• B
• C
• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct structure for BF₃?

• Option A.
• Option B. 
• Option C.
• Option D.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are in Phosphorus?

• 15
• 4
• 5
• 31

Tags

NGSS.HS-PS1-1

When writing Lewis Structures, only __________ electrons are used.

• Inner shell
• Core 
• Valence
• Stable

Tags

NGSS.HS-PS1-1

What is the correct Lewis Dot Structure for ammonia NH3

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is the correct molecular structure for carbon dioxide?

• 
• 
• 
• 

Is this the correct structure for CH₂O?

• Yes

• No

Tags

NGSS.HS-PS1-1

Which of the following is an acceptable Lewis structure for CH₃Cl?

• Option A
• Option B
• Option C
• Option D

Tags

NGSS.HS-PS1-1