Valence Electrons and Lewis Dot Structures

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

• 3

• 4

• 5

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How many valence electrons does Tin (Sn) have?

• 8

• 7

• 5

• 4

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How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

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How many valence electrons does Bromine (Br) have?

• 5

• 6

• 7

• 8

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Valence electrons are: 

• Electrons farthest away from the nucleus
• Electrons closest to the nucleus
• Electrons that just come and go - they don't stay with the atom
• Electrons in the second shell

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Which of the following has a full valence shell?

• Oxygen
• Neon
• Barium
• Carbon

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What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

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This is a correct dot diagram for neon (Ne)

• true

• false

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Which of these is incorrect?

• 
• 

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

• 2
• 6
• 8
• 10

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