Chapter 3 began with a historical study of models of the atom. The Lesson 11 PowerPoint provides key vocabulary around the components of the atom (proton, electron, neutron, and nucleus). To go along with the Lesson 11 Worksheet, students also received a handout explaining the five models of the atom. Students also received a copy of the Periodic Table for reference. For homework, students should complete questions 1-5 from the end of Lesson 11 in the textbook.