Students will be able to…
• Compare the Bohr Diagrams of a neutral atom and an anion/cation.
• Determine which is larger when comparing a neutral atom to an anion/cation
• Explain why a certain atom/ion is larger than its counterpart.
• Ionic Radii: Part I
• Ionic Radii: Part II
• Ionic Radii: Part I – Example Key
• Ionic Radii: Part II – Example Key
• Ionic Radii WS
• Ionic Radii WS – KEY
• Ionic Radii: Trend Practice #1
• Ionic Radii: Trend Practice #2
• Ionic Radii: Trend Practice #1 & #2 – KEY
Additional Required Materials:
• Cereal OR Stickers (Stickers would make this a great Interactive Notebook assignment!)
• Periodic Table
• “Ionic Radii: Part I & II”
o Students use cereal or stickers to create the Bohr Diagram of a neutral atom and a Bohr Diagram of an ion of the same element. Students then explain which is larger in radius and why. (Note: If using cereal, print each page single sided. Only double side the page if using stickers for the assignment.)
o Assign each student a different element. Use elements #1-20. Assign a student with a positive ion for “Part I” and a negative ion for “Part II.”
• “Ionic Radii WS”
o Students may complete assignment individually. This could be used for an absent student in place of the “Ionic Radii: Part I & II” assignment.
• “Ionic Radii: Trend Practice #1 & #2”
o Can be used as a class assignment, warm-up, exit ticket, and/or HW assignment.