Grade 8 Science Q2 - Science of Materials
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This course guides learners through the evolution and structure of the atom. Students will build timelines of atomic theory, draw and label modern atomic models, identify and calculate protons/neutrons/electrons, distinguish elements and compounds, and master the first 20 elements plus periodic trends like groups, periods, and valence electrons using visual activities and practice problems. Perfect for beginners and K–12 learners preparing for chemistry.
Meet Your Instructors
What you'll learn
- Construct a well-labeled timeline illustrating the evolution of scientific understanding regarding the atom, identifying key scientists and their conceptual models.
- Draw and label the structure of the current atomic model, distinguishing between the dense, central nucleus and the surrounding electron shells.
- Differentiate protons, neutrons, and electrons by their symbol, charge, mass, and location, and calculate the number of each particle for several common elements.
- Describe pure substances as having a fixed chemical composition and differentiate between elements (defined by a unique number of protons) and compounds (formed by two or more elements chemically bonded).
- Identify the names and symbols of the first 20 common elements, and discuss the significant contributions of early scientists (e.g., Mendeleev) in developing the periodic table.
- Explain how the arrangement of elements into 7 periods and 18 groups is based on their electron structure, particularly the number of valence electrons which determines chemical properties.