Grade 8 Science Module: Atoms – Inside Out

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.

This module was designed and written with you in mind. It is here to help you master the nature of atomic structure. 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 is divided into three lessons, namely:

  • Lesson 1 – The Properties of Subatomic Particles
  • Lesson 2 – Plum Pudding and Nuclear Models of the Atom
  • Lesson 3 – The Number of Subatomic Particles in Atoms, Ions and Isotopes

After going through this module, you are expected to:

1. Name and describe the structure of atoms, including its mass, and locations of protons, neutrons, and electrons inside an atom;

2. Identify the electric charge of an atom and its subatomic particles;

3. Locate the atomic number in a periodic table of elements;

4. Identify the subatomic particles associated with mass number;

5. Determine the number of neutrons from the mass number;

6. Interpret shorthand notations for isotopes and atoms;

7. Infer that ions are formed from the removal or addition of electron/s;

8. Evaluate the net electric charge of an atom; and

9. Determine the number of protons, neutrons, and electrons in a particular atom.

Grade 8 Science Quarter 3 Self-Learning Module: Atoms – Inside Out


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