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

• 2

• 8

• 6

• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons does each line indicate are shared?

• 1
• 2
• 3
• 4

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

• 4
• 6
• 8
• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does phosphorus have?

• 15

• 4

• 5

• 31

Tags

NGSS.HS-PS1-1

Six electrons are shared in a

• single bond

• double bond

• triple bond

• quadruple bond

This is a correct Lewis symbol for oxygen (O).

• true

• false

Which of the following is the correct Lewis structure for a molecule of fluorine?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

How many total valence electrons are participating in bonding in this molecule?

• 8

• 4

• 2

• 3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct Lewis structure for NH₃?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many total valence electrons does the Lewis structure for NO₃ ^- have?

• 23

• 20

• 18

• 24