Lesson Plan | Socioemotional Learning | Periodic Table: History of the Table

Objectives

Duration: (10 - 15 minutes)

The purpose of this stage is to provide students with a clear understanding of the topic to be addressed, highlighting the historical and scientific relevance of the evolution of the periodic table. This will allow students to contextualize the lesson content within a broader perspective, facilitating the connection between the theoretical aspects of Chemistry and their practical applications in scientific development.

Main Goals

1. Recognize the historical importance of the evolution of the periodic table.

2. Identify the main atomic models that contributed to the development of the current periodic table.

Introduction

Duration: (15 - 20 minutes)

Emotional Warm-up Activity

Guided Deep Breathing

The suggested emotional warm-up activity is Guided Deep Breathing. This technique aims to calm the mind and focus the students' attention, preparing them for the lesson. Deep Breathing helps to reduce stress and anxiety, promoting a state of relaxation and concentration. The activity consists of a series of deep, controlled breaths, followed by moments of silent reflection.

1. Preparing the Environment: Ask the students to sit comfortably in their chairs, with their feet firmly on the floor and their hands resting on their laps. Request that they close their eyes or focus their gaze on a point ahead.

2. Beginning the Breathing: Instruct the students to inhale deeply through their nose, counting mentally to four, filling their abdomen with air.

3. Pause: Ask them to hold their breath for two seconds.

4. Exhalation: Instruct the students to exhale slowly through their mouth, counting mentally to six, completely emptying their lungs.

5. Repetition: Ask them to repeat the deep breathing cycle five times, maintaining focus on the counting and the sensation of air entering and leaving their body.

6. Silent Reflection: After the last exhalation, maintain a moment of silence for about a minute, allowing the students to feel the calming effects of deep breathing.

7. Conclusion: Slowly ask the students to open their eyes and return their attention to the classroom, feeling more relaxed and focused.

Content Contextualization

The Periodic Table is much more than a simple chart of chemical elements. It represents a milestone in the evolution of science, the result of centuries of study and discoveries. Each atomic model, from Dalton's indivisible spheres to the current quantum model, reflects humanity's relentless pursuit of understanding matter and its interactions. This scientific journey is filled with challenges, collaborations, and moments of inspiration that can be likened to the challenges and achievements we face in our daily lives.

Studying the evolution of the Periodic Table teaches us about the importance of persistence, curiosity, and collaboration. By understanding how scientists worked together, overcame obstacles, and shared knowledge, we can reflect on our own social and emotional skills. This learning helps us develop empathy, cooperation, and the ability to make responsible decisions, skills essential in both science and life.

Development

Duration: (60 - 75 minutes)

Theoretical Framework

Duration: (20 - 25 minutes)

1. History of the Periodic Table:

2. Explain how the Periodic Table is an organized representation of chemical elements, based on their properties.

3. Highlight that the current table is the result of significant historical evolution, with contributions from various scientists over the centuries.

4. Dalton's Model:

5. Describe John Dalton's atomic model, which proposed that atoms are indivisible and indestructible spheres.

6. Explain how this model helped establish the idea that each element is composed of a specific type of atom.

7. Thomson's Model:

8. Explain J.J. Thomson's model, which introduced the idea that atoms contain subatomic particles, such as electrons.

9. Use the analogy of 'raisin pudding' to help students visualize how Thomson imagined electrons scattered in a 'sea' of positive charge.

10. Rutherford's Model:

11. Describe Rutherford's experiment (gold foil experiment) and how it led to the discovery of the atomic nucleus.

12. Explain that, according to Rutherford, most of the mass of the atom is concentrated in a small, dense nucleus, with electrons orbiting around it.

13. Bohr's Model:

14. Explain Niels Bohr's model, which introduced the idea that electrons orbit the nucleus in discrete energy levels.

15. Discuss how Bohr's model helped explain the stability of atoms and the emission spectra of elements.

16. Evolution to the Current Periodic Table:

17. Briefly describe the contribution of other scientists, such as Dmitri Mendeleev, who organized the elements in a table based on their periodic properties.

18. Explain how the modern periodic table is organized according to atomic number and provides valuable information about the chemical and physical properties of the elements.

Socioemotional Feedback Activity

Duration: (15 - 20 minutes)

Building the Timeline of the Periodic Table

In this activity, students will work in groups to create a timeline highlighting the main events and scientists who contributed to the evolution of the Periodic Table. The activity aims to promote collaboration and a deep understanding of the theoretical concepts addressed.

1. Divide the class into groups of 4 to 5 students.

2. Provide poster boards, markers, scientific magazines, and access to electronic devices for research.

3. Instruct the groups to research and list the main events and scientists related to the evolution of the Periodic Table.

4. Request that each group create a visual timeline on a poster board, highlighting the events in chronological order and including images and descriptions of the scientists and their contributions.

5. Ask the groups to present their timelines to the class, explaining each event and the importance of each scientist.

6. During the presentations, encourage students to ask questions and comment on their peers' work, promoting an environment of knowledge sharing.

Group Discussion

After completing the activity, start a group discussion using the RULER method to provide socio-emotional feedback. Begin by recognizing the emotions that students may have experienced during the activity, such as excitement, frustration, or satisfaction. Encourage students to share how they felt working in groups and presenting their work.

Understand and help students to identify the causes of these emotions. For instance, excitement may have come from discovering new information, while frustration may have arisen from difficulties in research. Accurately name the emotions and encourage students to express these feelings appropriately, emphasizing the importance of clear communication.

Finally, discuss ways to regulate these emotions effectively, such as breathing techniques to reduce stress or collaboration strategies to improve group work. Reinforce the importance of social skills and social awareness in the context of collaborative activities and learning in general.

Conclusion

Duration: (10 - 15 minutes)

Emotional Reflection and Regulation

To reflect on the challenges faced during the lesson and how students managed their emotions, suggest a writing or discussion activity. Ask students to write or discuss in small groups about the most challenging moments during the lesson and how they felt facing them. Ask how they dealt with these emotions and what strategies they used to maintain focus and collaboration. Encourage them to reflect on what they could do differently in future situations to improve their emotional management and group work.

Objective: The objective of this subsection is to encourage self-assessment and emotional regulation, helping students identify effective strategies for dealing with challenging situations. Reflection allows students to recognize their emotions, understand their causes and consequences, and develop skills to express and regulate them more effectively in the future.

Closure and A Look Into The Future

To conclude the lesson, suggest that the teacher helps students establish personal and academic goals related to the content studied. Explain the importance of setting clear and achievable goals for both academic progress and personal development. Ask students to write down their goals and share them with the class, if they feel comfortable, promoting a supportive environment.

Possible Goal Ideas:

1. Understand the historical importance of the Periodic Table.

2. Identify the main scientists and their contributions to the evolution of the Periodic Table.

3. Develop research and group presentation skills.

4. Improve the ability to work collaboratively.

5. Learn to manage emotions in challenging situations. Objective: The objective of this subsection is to strengthen students' autonomy and the practical application of learning, aiming for continuity in academic and personal development. By setting goals, students are encouraged to think about the future and plan their actions to achieve their objectives, both in the academic context and in their personal lives.