Lesson Plan | Active Learning | Periodic Table: Introduction

Assumptions: This Active Lesson Plan assumes: a 100-minute class, prior student study with both the Book and the start of Project development, and that only one activity (among the three suggested) will be chosen to be conducted during the class, as each activity is designed to take up a significant portion of the available time.

Objectives

Duration: (5 - 10 minutes)

This stage of the lesson plan is crucial to establish a solid foundation of understanding about the periodic table. The outlined objectives aim to ensure that students not only memorize the elements but also grasp the logic behind their organization and grouping. This will enable them to apply knowledge more effectively in practical and theoretical situations, as well as facilitate long-term retention of information.

Main Objectives:

1. Ensure that students understand the basic structure of the periodic table, including the organization of elements into metals, nonmetals, and noble gases.

2. Develop students' ability to recognize and distinguish the main chemical families, with special focus on the halogen family.

Side Objectives:

1. Encourage students' curiosity and interest in chemistry through practical examples and real applications.

Introduction

Duration: (15 - 20 minutes)

The introduction of the lesson plan aims to engage students through problem situations that require them to apply and review prior knowledge about the periodic table. Additionally, it seeks to contextualize the importance of the subject with practical applications and curiosities, highlighting how the study of the periodic table relates to the real world. This stage is essential to motivate students and establish a connection between the theory studied and its practical relevance.

Problem-Based Situations

1. Imagine you are a scientist and need to develop new technology that maximizes the properties of halogens. How can the periodic table help you choose the right elements for your invention?

2. If you were responsible for classifying a series of unknown elements into metals, nonmetals, and noble gases, what characteristics would you observe and how does that relate to the organization of the periodic table?

Contextualization

The periodic table is not just a set of elements organized arbitrarily; it is the key to understanding the chemistry that governs our world. For example, the halogen family includes elements like chlorine, which is essential for water purification, and fluorine, which strengthens tooth enamel. These elements are vital in our daily lives and are organized in the periodic table according to their chemical and physical properties, facilitating the study of their reactions and uses.

Development

Duration: (70 - 75 minutes)

The Development stage is designed to allow students to practically and interactively apply their prior knowledge about the periodic table. Through group activities, they will have the opportunity to explore the structure and properties of elements in various contexts, reinforcing collaborative learning and critical thinking. Each activity has been carefully crafted to be engaging and educational, ensuring that students can solidify and expand their knowledge in a fun and memorable way.

Activity Suggestions

It is recommended to carry out only one of the suggested activities

Activity 1 - The Periodic Table Game

> Duration: (60 - 70 minutes)

- Objective: Develop teamwork skills and reinforce knowledge about the arrangement of elements in the periodic table.

- Description: In this playful activity, students will be divided into groups of up to 5 people, and each group will receive a large blank cardboard copy of the periodic table. The goal is to correctly fill in the periodic table with the provided elements, but with a twist: each element will be delivered in the form of a puzzle, where only part of the information (atomic number, symbol, atomic mass, etc.) will be present, and students will have to collaborate to fit the pieces correctly.

- Instructions:

• Divide the class into groups of up to 5 students.

• Distribute the blank periodic table cardboards to each group.

• Provide each group with a set of puzzle pieces, each containing information about an element of the periodic table.

• Students must discuss among themselves and decide where to place each piece on the periodic table, trying to fill in all the elements correctly.

• After the allotted time, each group presents their filled-in table and explains their choices.

Activity 2 - The Mystery of the Missing Elements

> Duration: (60 - 70 minutes)

- Objective: Stimulate logical reasoning and the application of periodic table concepts to solve a practical problem.

- Description: Students will take on the role of chemical detectives, having to solve a mystery involving elements of the periodic table. Each group will receive a set of clues and must use their knowledge of the properties of the elements to deduce which elements are missing from a partially erased periodic table.

- Instructions:

• Organize the class into groups of no more than 5 students.

• Distribute a set of clues and a partially erased copy of the periodic table to each group.

• The clues should include information like 'this element is a halogen' or 'this element has an atomic number greater than 50.'

• Students must use the clues to deduce which elements are missing from the table.

• Each group presents their findings and justifications.

Activity 3 - Element Builders

> Duration: (60 - 70 minutes)

- Objective: Encourage creativity and deepen understanding of the characteristics of elements in the periodic table.

- Description: In this activity, students will 'build' elements of the periodic table using art materials such as modeling clay and cardboard. Each group will choose an element and must represent it three-dimensionally, including its physical and chemical properties. In the end, the 'built' elements will be displayed, and the groups will explain their choices and how the properties of the element are reflected in the construction.

- Instructions:

• Divide the class into groups of up to 5 students.

• Each group chooses an element from the periodic table to represent.

• Students must use modeling clay and cardboard to create a three-dimensional model of the element, highlighting its main properties.

• After construction, each group explains the characteristics and properties of the represented element.

• Display the built elements.

Feedback

Duration: (10 - 15 minutes)

The purpose of this feedback is to consolidate and share the knowledge acquired by students during the practical activities. Through the group discussion, students have the opportunity to verbalize and reflect on what they learned, which promotes a deeper understanding and the ability to apply knowledge in varied contexts. Additionally, this stage helps identify areas where students may need more support or explanation, allowing the teacher to adjust future lessons to meet the specific needs of the group.

Group Discussion

At the end of the activities, gather all students for a group discussion. Start the discussion with a brief introduction, explaining that the purpose is to share what each group learned during the activities and what they found most challenging and interesting. Encourage students to express their opinions and listen attentively to their peers' contributions. This moment is crucial to reinforce collaborative learning and for students to perceive different perspectives and approaches to the same content.

Key Questions

1. What were the main challenges your group faced when trying to fill in the periodic table or solve the mystery of the missing elements?

2. How did the structure of the periodic table help your group organize the information during the activities?

3. Was there any element or chemical family that sparked more curiosity or that you would like to explore further?

Conclusion

Duration: (5 - 10 minutes)

The purpose of this stage is to ensure that students have a clear and consolidated understanding of the discussed themes, as well as to comprehend the applicability and practical importance of the periodic table. Recapping key points allows students to reinforce learning, while explaining how theory connects with practice and the real world encourages appreciation of the studied content.

Summary

In this final stage, the teacher should summarize and recap the main points covered during the lesson, emphasizing the structure and organization of the periodic table, the distinction between metals, nonmetals, and noble gases, and the importance of chemical families, especially halogens. This moment of synthesis helps reinforce learning and ensures that students have a clear understanding of the discussed concepts.

Theory Connection

Today's lesson was carefully designed to connect theory with practice. Through interactive activities, students were able to apply theoretical concepts of the periodic table in practical scenarios, such as filling out a puzzle-shaped table and solving a mystery. This not only reinforced their understanding of the subject but also demonstrated how the periodic table is an essential tool in applied chemistry.

Closing

Finally, it is important to highlight the relevance of the periodic table in daily life. The chemical elements we studied today have practical applications in various fields, from medicine to technology, and understanding their arrangement in the periodic table is essential for understanding how they interact and can be used. Chemistry, therefore, is not just an academic discipline, but a science that permeates our daily lives.