How to Create a Safe and Inclusive Learning Environment for LGBTQIA+ Students

Grade 9 Science Module: Electronic Structure of Matter

This Self-Learning Module (SLM) is prepared so that you, our dear learners, can continue your studies and learn while at home. Activities, questions, directions, exercises, and discussions are carefully stated for you to understand each lesson.

Each SLM is composed of different parts. Each part shall guide you step-by-step as you discover and understand the lesson prepared for you.

Pre-tests are provided to measure your prior knowledge on lessons in each SLM. This will tell you if you need to proceed on completing this module or if you need to ask your facilitator or your teacher’s assistance for better understanding of the lesson. At the end of each module, you need to answer the post-test to self-check your learning. Answer keys are provided for each activity and test. We trust that you will be honest in using these.

Please use this module with care. Do not put unnecessary marks on any part of this SLM. Use a separate sheet of paper in answering the exercises and tests. And read the instructions carefully before performing each task.

If you have any questions in using this SLM or any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator.

This module is designed and written with you in mind. It is here to help you master Electronic Structure of Matter. The scope of this module permits it to be used in many different learning situations. The language used recognizes the diverse vocabulary level of students. The lessons are arranged to follow the standard sequence of the course, but the order in which you read them can be changed to correspond with the textbook you are now using.

The module focuses on achieving this learning competency:

  • Explain how the Quantum Mechanical Model of the atom describes the energies and positions of the electrons.

After going through this module, you are expected to:

  • predict the probable location of the electron/s in an atom (electron cloud, Heisenberg’s Uncertainty Principle);
  • describe electron configuration and write the correct electron configuration of the given element;
  • describe the set of quantum numbers and complete the given set of quantum numbers for each given element; and
  • supply the following data from the electron configuration such as: period number, group number, number of paired and unpaired electrons, number of valence electrons and number of core electrons.

Grade 9 Science Quarter 2 Self-Learning Module: Electronic Structure of Matter


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