Self Assessment 08b_Lewis Structures

What is a valence electron?

• electron found in a middle shell

• electron found in outermost shell

• electron found in innermost shell

• electron not found in a shell

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

Hydrogen being an exception to the octet rule, needs _____ electrons in its outer energy level to be stable.

• 4

• 6

• 8

• 2

Three pairs of electrons are shared in a

• Single bond
• Double bond
• Triple bond

Draw the lewis dot structure for F2. Which of the following is the correct Lewis dot structure for the molecule F₂?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons are shared in each bonding line?

• 1

• 2

• 3

• 4

Which of these is the correct Lewis structure for NH₃?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

When drawing Lewis structures, only __________ electrons are used.

• inner shell

• core

• valence

• stable

Which of the following is the correct Lewis structure for CH₂O?

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

Tags

NGSS.HS-PS1-1

What is the correct structure for BF₃?

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

Tags

NGSS.HS-PS1-1