Title Trends in the Periodic Table
Title: Trends in the Periodic Table Subject Area: Chemistry Grade Level: 10th Concept(s) Addressed: Atomic Radius Ionization Energy Electron Affinity Ionic Charge and Ionic Radius Knowledge Goal(s): Students will understand the trends in atomic radius, ionization energy, and electron affinity as you travel across a row/period, down a column/family, or through the Periodic Table. Performance Objective(s): Students will be able to - show pictorially and through explanation the trends in the Periodic Table for atomic radius, ionization energy, and electron affinity - explain how filled electron levels and sublevels affect the trends - use Microsoft Excel to plot trends Curriculum Standard(s) Addressed: Instructional Procedures: This material was used during two class periods. Parts 1 and 2 were completed during the first day and Part 3 completed during second day. Students can work separately or in groups. The materials are presented as a worksheet with questions and instructions to guide students through a plotting activity created in Microsoft Excel. Macros are already created in the Excel file provided to students. The worksheet provides instructions on how to use the Excel file and has leading questions to get students thinking about the effect electron configuration has on trends in the Periodic Table. Periodic Tables were provided to each student if/when needed. Assessment Rubric: No formal assessment rubric was created. Comments were made on students’ handouts for questions answered wrong. Teacher Notes: This Excel activity gives students a chance to create plots. The charts are already created in Excel, so all the students have to do is fill in the data tables. This is good for students who have never used Excel to plot before. Prerequisites for this lesson include electron configuration, definition of energy levels and sublevels, electron/valence shell. Handouts for Students: PTTrendsWS.pdf Additional Resources: PTTrends.xls **Save Excel file to computer before opening. Macro Security must be set to Medium. Click 'Enable Macros' when file opens.