Chemistry Unit 2 Notes: Atomic Structure & Periodic Table (NC Curriculum) | Electron Config + Trends + Ions

This document provides clear and organized notes for Chemistry Unit 2, covering atomic structure and the periodic table. It explains the structure of atoms, including protons, neutrons, and electrons, as well as how to calculate atomic number, mass number, and isotopes. The notes also break down electron configurations and the importance of valence electrons in chemical behavior. In addition, this guide covers key periodic table trends such as atomic size, electronegativity, and ionization energy, helping students understand how elements behave across periods and down groups. The content is presented using a combination of bullet points and brief explanations, making it easy to study and review. This resource is ideal for test preparation or building a strong foundation in atomic structure.