The ability to read the Periodic Table and make note of certain trends across a Period and down a Group is a fundamental concept in Chemistry.
This is why ChemistryNinja made this fill-in-the-blank Periodic Trends lesson plan for middle school Chemistry teachers. These notes first cover the definition of each trend, including atomic radius, ionic radius, ionization energy, and electronegativity, and explains how they change with respect to the Periodic Table, and then provides several examples for students to practice applying this knowledge and explaining their answers conceptually.
The second part of the lesson includes two activities for students to participate in so that they can understand the ionization energy trend more thoroughly. By the end of the activity, students will be able to explain why the ionization energy trend is dependent upon an element's reactivity and why it is directly opposite from that of the atomic radius trend.