Warm Up

This is a correct dot diagram for nitrogen (N)

• true

• false

Which of these is incorrect?

• 
• 

This could be the dot diagram of

• Mg

• Cl

• C

• O

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

Which of these is correct?

• 
• 
• 

This could be the dot diagram of 

• Ne
• Si
• Al
• Be

How many valence electrons does Neon Have?

• 4 Valence electron

• 5 Valence electron

• 6 Valence electron

• 7 Valence electron

• 8 Valence electron

USE THE PERIODIC TABLE

How many valence electrons does Phosphorus have?

• 31

• 5

• 15

• 4

Which elements have the most similar chemical properties?

• boron and carbon

• oxygen and sulfur

• aluminum and bromine

• argon and silicon

How many valence electrons should Magnesium have in its Lewis dot model?

• 1

• 2

• 3

• 4