Electron dot diagrams

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

This could be the dot diagram of

• P
• Ar
• Na
• B

Most elements will gain or lose electrons so that they end up with _______ valence electrons.

• 2
• 6
• 8
• 10

Which of these is correct?

• 
• 
• 

This could be the dot diagram of 

• Ne
• Si
• Al
• Be

Which of the following is the correct electron-dot diagram for an atom with an electron configuration of 2-8-18-5?

• 
• 
• 
• 

How many valence electrons does Aluminum Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

This is a correct dot diagram for oxygen (O)

• true
• false

This could be the dot diagram of

• Be
• B
• C
• Ne

This could be the dot diagram of

• Al
• Si
• Na
• Mg