Have students look at the Periodic table of the elements 1–20 they used in lesson 2 to answer the following question: Can you identify which atom this model represents? If students can’t answer this question, point out that there are 8 electrons. Let students know that they will learn more about electrons and energy levels later in this lesson. The smaller dots surrounding the nucleus represent electrons in the energy levels. The nucleus is represented by a dot in the center, which contains both protons and neutrons. Tell students that this energy level model represents an atom. Read more about energy level models in the teacher background section. Since it is very difficult to show these spheres, the energy levels are typically shown in 2 dimensions. They can think of electrons as being in the different energy levels like concentric spheres around the nucleus. Project the image Energy level cross-section.Įxplain to students that electrons surround the nucleus of an atom in three dimensions, making atoms spherical. In this lesson, they will focus on the arrangement of the electrons in each element. Review with students that in lesson two they focused on the number of protons, neutrons, and electrons in the atoms in each element. Engage Introduce students to the idea that electrons surround the nucleus of an atom in regions called energy levels. This is an online version of the periodic table card game from this lesson that you can assign as class work or homework after students have played the game in the classroom. This lesson is intended as a follow-up to chapter 4, lesson 2.įor Lesson 4.3, students can play the Periodic Table Game, Game #2. You will need the five cards on the right hand side of each sheet. About this Lessonīe sure that the 20 atom name cards are posted around the room. The activity sheet will serve as the “Evaluate” component of each 5-E lesson plan. Evaluationĭownload the student activity sheet, and distribute one per student when specified in the activity. Students will be able to interpret the information given in the periodic table to describe the arrangement of electrons on the energy levels around an atom. They will again try to correctly match the cards with each element. Students will be given cards with information about the electrons and energy levels for each of the first 20 atoms. Students will first look at a diagram and animation to understand the basic pattern of the arrangement of electrons on energy levels around an atom. Students will again focus on the first 20 elements.
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