Lewis Structures for Molecules

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Tags

NGSS.MS-PS1-1

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

• 5
• 6
• 7
• 8

Tags

NGSS.MS-PS1-1

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

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

Tags

NGSS.MS-PS1-1

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

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

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

• 2
• 8
• 0
• 4

Tags

NGSS.MS-PS1-1

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

• 2
• 1
• 4
• 6

Tags

NGSS.MS-PS1-1

The correct Lewis structure for BF₃ would have exactly:

• 1 double bond.

• 2 double bonds.

• 1 triple bond.

• no double bonds.

The total number of electrons to be counted for the Lewis structure of the PO₄^3- polyatomic ion is:

• 8

• 26

• 29

• 32

Tags

NGSS.HS-PS1-1

How many valence electrons are in the nitrate ion?

• 18

• 22

• 23

• 24

Tags

NGSS.HS-PS1-1

Each line in a Lewis Structure represents __________ electron(s).

• 3
• 2
• 1
• 4