Lewis Structure of Elements

How many electrons should Oxygen have around its Lewis dot model?

• 5
• 6
• 7
• 8

Tags

NGSS.HS-PS1-1

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Which of the following is the correct Lewis structure for the compound PBr₃?

• structure A
• structure B
• structure C
• structure D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the correct Lewis structure for CH_4, how many unshared electron pairs surround the carbon?

• 2
• 8
• 0
• 4

In CO₂, how many UNSHARED pairs of electrons does each oxygen have?

• 2
• 1
• 4
• 6

Tags

NGSS.HS-PS1-2

This is the correct dot diagram for sodium (Na)

• true
• false

Tags

NGSS.HS-PS1-1

This is a correct dot diagram for oxygen (O)

• true
• false

Tags

NGSS.MS-PS1-1

This is a correct dot diagram for fluorine (F)

• true
• false

Tags

NGSS.HS-PS1-1

This is the correct dot diagram for nitrogen (N)

• true
• false

Tags

NGSS.HS-PS1-1