, Sources:
• (Lecture 1: Intro to Chemistry)
• (Lecture 2: Molecules, Ions, Nomenclature)
🔹 1. WHAT IS CHEMISTRY?
Core Definition
Chemistry is the study of matter—its composition, structure, properties, and changes.
Key Idea
• Chemistry operates at the microscopic level (atoms, molecules)
• The real world is macroscopic, but chemistry explains it
Matter Exists As:
• Solid → particles tightly packed, low movement
• Liquid → particles flow, moderate movement