I. Activity No. 2: Understanding Atomic Structure (15 minutes) II. Objective(s): At the end of the activity, the learners are expected to: 1. Describe the composition of atoms. 2. Identify and compare the sizes of protons, neutrons, and electrons. 3. Determine the charges of subatomic particles. 4. Illustrate the structure of boron and helium atoms. Materials Needed: Textbook/Notes on atomic structure, paper, colored pencils, ruler IV. Instructions: Write a brief explanation (3-5 sentences) of how atoms are composed. Answer the following questions based on your reading and understanding: 1. Which is larger, a proton or an electron? 2. Which is larger, a neutron or an electron? 3. What are the charges for each of the three subatomic particles? 4. Where is most of the mass of an atom located? Using the drawing paper and colored pencils, sketch a diagram of a boron atom, which has five protons and six neutrons in its nucleus. Label the protons, neutrons, and electrons