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Chemistry Periodic Table Trends Guided Inquiry Lesson

Kendo's Chemistry Store
Grade Levels
9th - 11th
Resource Type
Formats Included
  • Zip
99 pages
Kendo's Chemistry Store


Periodic Table Trends Guided Inquiry Lesson
This is a student-centered, active learning lesson without lecture or notetaking!

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Texas Chemistry Standards (TEKS)
C.5.A: The student is expected to explain the use of chemical and physical properties in the historical development of the periodic table.
C.5.B: The student is expected to use the periodic table to identify and explain the properties of chemical families, including alkali metals, alkaline earth metals, halogens, noble gases, and transition metals.
C.5.C: The student is expected to use the periodic table to identify and explain periodic trends including atomic and ionic radii, electronegativity, and ionization energy.
Lesson Summary:
This guided inquiry lesson enables students to construct their own understanding of common periodic trends including: valence electrons, energy levels, atomic radius, ionic radius, electronegativity, ionization energy, and properties of periodic table families. Students are able to actively learn the material without lecture or note taking.

Part 1: History and Basic Periodic Trends
• Students look at a pattern of colored objects and predict the shapes and colors of objects that are missing from the pattern. They then relate the usage of patterns to predict missing information to Mendeleev’s creation of a periodic table that was able to predict the properties of unknown elements.

• Students arrange a set of periodic table cards. Each card shows an element’s Bohr model, ionization energy, and electronegativity value. By comparing the Bohr Models on each card, they discover periodic table trends in valence electrons and energy levels. They then use this information and the periodic table to practice determing the number of valence electrons and energy levels in Group A atoms.

Part 2: Coulomb Forces and Periodic Trends
• Students explore the behavior of charged particles in terms of attraction/repulsion and behavior with and without barriers. They then relate these concepts to the attraction of a positively charged nucleus for its valence electron(s). Students explore the changes in attraction between the nucleus and valence electron(s) as atoms: 1) gain additional energy levels, 2) gain additional protons while adding valence electrons to the same energy level.

• Using the periodic table cards from Part 1, students explore changes in atomic radius, ionization energy, and electronegativity across and down the periodic table. Students are then asked to use their understanding of Coulomb forces to propose an explanation for why these changes occur.

• Students make observations and draw conclusions about the changes in the radius of neutral atoms and ions. They then summarize changes in ionic radius across and down the periodic table.

Part 3: Periodic Table Families
Students read about the key properties of common periodic families and familiarize themselves with their locations on the periodic table. Students then participate in a scavenger hunt where they answer questions about the locations and properties of periodic table families.

Periodic Task Cards
Students complete a set of task cards to practice the follow concepts: valence electrons and energy levels, periodic trends, properties of periodic table families

Student Study Sheets
Students are provided with student study sheets summarizing all of the important concepts and vocabulary in this lesson.

BONUS: Periodic Table Game
Students may also practice the concepts in this lesson by playing a periodic table board game.

Learning Objectives (Bloom’s Revised Taxonomy):
Remembering: Determine the number of valence electrons and energy levels present in Group A atoms.
Understanding: Explain the following terms: valence electron, periodic table group, periodic table group, energy level, Coulomb force, atomic radius, ionization energy, electronegativity, ionic radius, periodic trend, ion periodic table family.
Applying: Predict the properties of missing elements based on periodic trends.
Analyzing: Describe how periodic trends in atomic radius, ionization energy, and electronegativity can be explained by the presence of Coulomb forces in atoms.
Evaluating: Use periodic trends to evaluate the following properties in a group of elements: atomic radius, ionization energy, electronegativity, ionic radius.


Included in this Download:
• Cover page (1 page)
• Guided inquiry lesson (22 pages)
• Handouts (3 pages)
• Task Cards – 6 versions (18 pages)
• Task Card Answer Sheet (1 page)
• Student study sheets (5 pages)
• Teacher notes (2 pages)
• Guided inquiry lesson with suggested answers (22 pages)
• Task card answers (3 pages)
• Periodic Table Cards (3 pages)
• Scavenger Hunt Cards (3 pages)
• Game board (1 page)
• Game cards (12 pages)
• Game instructions and answers (3 pages)


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Kendo's Chemistry Store
Total Pages
99 pages
Answer Key
Teaching Duration
90 minutes
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