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

• 2
• 8
• 6
• 18

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

A covalent bond is

• a bond that shares electrons metallicaly

• A bond that shares electrons between non metals

• Metalloids bonding

• metals and nonmetals bonding

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

How many electrons are shared in each bonding line?

• 1

• 2

• 3

• 4

How many valence electrons does phosphorus have?

• 15

• 4

• 5

• 31

This is a correct dot diagram for oxygen (O)

• true
• false

Which of these is the correct Lewis structure for NH₃?

• 
• 
• 
• 

How many total valence electrons are participating in bonding in the molecule above?

• 8

• 4

• 2

• 3