tpw Valence Electrons & Oxidation Numbers

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

• 3

• 4

• 5

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NGSS.HS-PS1-1

How many electrons go in the first shell (ring) ?

• 6

• 8

• 4

• 2

How many valence electrons does Tin (Sn) have?

• 8

• 7

• 5

• 4

Tags

NGSS.HS-PS1-1

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

Tags

NGSS.HS-PS1-1

How many valence electrons does Bromine (Br) have?

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these is incorrect?

• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

Tags

NGSS.HS-PS1-1

How many valence electrons?

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Determine the oxidation number of the following element: Aluminum (Al)

• +5

• +3
• -3

• -5

Tags

NGSS.HS-PS1-1