Chemistry — Foundational Concepts of Matter + 4 more topics

You encounter matter every second of your life. Everything you can touch, taste, or see is matter. To understand chemistry, you first need to grasp what matter is and how it's organized.

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You encounter different states of matter every day. Think about an ice cube, a glass of water, and steam from a kettle. These are all the same substance (water) but in different states: solid, liquid, and gas. The key difference lies in the energy of the particles and the forces between them.