Model and Invent Atomic Structure.. Lab Preview Directions: Answer these questions before you begin the Lab. 1. Where are electrons located relative to the nucleus? 2. Where are neutrons and protons located? How do they relate to an element’s atomic number? As more information has become known about the structure ofthe atom, scientists have developed new models. Making your own model and studying the models of others will help you learn how protons, neutrons, and electrons are arranged in an atom. Can an element be identified based on a model that shows the arrangement of the protons, neutrons, and electrons of an atom? Real-World Question How will your group construct a model of an element that others will be able to identify? Possible Materials magnetic board rubber magnetic strips candy-coated chocolates scissors paper marker coins Goals ? Design a model of a chosen element. ? Observe the models made by others in the class and identify the elements they represent. Safety Precautions WARNING: Never eat any food in the laboratory. Wash hands thoroughly. Plan the Model 1. Choose an element from periods 2 or 3 of the periodic table. How can you determine the number of protons, neutrons, and electrons in an atom given the atom’s mass number? 2. How can you show the difference between protons and neutrons? What materials will you use to represent the electrons of the atom? How will you represent the nucleus? 3. How will you model the arrangement of electrons in the atom? Will the atom have a charge? Is it possible to identify an atom by the number of protons it has? 4. Make sure your teacher approves your plan before you proceed. Make the Model 1. Construct your model. Then record your observations on a separate sheet of paper and include a sketch. 2. Construct another model of a different element. 3. Observe the models made by your classmates. Identify the elements they represent….

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