Grade Level/Subject Unit Enduring Understanding SOL Objectives Physical Science 8th grade The Atom Atoms are composed of small particles that determine the properties of the atom. PS.3 PS.4 Title Lesson Objective: Inquiry Level Materials Needed How is it Level 3? The student will investigate and understand the modern and historical models of atomic structure. Key concepts include a) the contributions of Dalton, Thomson, Rutherford, and Bohr in understanding the atom; and b) the modern model of atomic structure. The student will investigate and understand the organization and use of the periodic table of elements to obtain information. Key concepts include a) symbols, atomic number, atomic mass, chemical families (groups), and periods; Make Your Atoms Build models of certain isotopes. Use the periodic table to determine the composition of atomic nuclei. 3 Periodic table, various colored whole punches recycled from the copy machine, glue sticks, pens. Teacher provides the research question. The methodology is developed by the students. The student can design an older Thompson model or the newer Rutherford model for deeper understanding. Make Your Atom Name ________________________________ Date __________________ Per ________________ Introduction: Imagine that you are a scientist at Labs-R-Us, which custom builds elements. Your job is to construct the custom elements and isotopes for health companies. You were hired for the position because of your knowledge about atomic structure and your understanding of how isotopes of an element differ from each other. Now, it’s time to put that knowledge to work! Objectives: Build models of nuclei of certain isotopes. Use the periodic table to determine the composition of atomic nuclei. Procedure: 1. Find the name for each element in the data table below. 2. Using the colored whole punches, pens and pencils, design the atoms listed in each box. Gathering Data/ Demonstrating the Model: Hydrogen-2 Helium-4 Beryllium-9 Carbon-14 Use this space to make one isotope of any other atom. Analyzing the Results: 1. How is the mass number used with the atomic number in this lab? (Explain the operation as divide, etc.) 2. Explain how mass numbers are involved in isotopes. Drawing Conclusions: 1. Solve the amount of subatomic particles for uranium-235, and explain how to find each. Reviewing Vocabulary: 1. A(n) _________________ is an atom that has the same number of protons but different numbers of neutrons. 2. The dense, positively charged center of the atom is the_______________________. 3. Atoms are composed of small particles that determine the ___________________ of the atom. 4. The three major subatomic particles are the _____________ , ______________ , and _________________.