chemicals

Chemicals are substances made up of atoms, the tiny building blocks of matter. They can be elements, like oxygen or gold, or compounds, which are combinations of elements, like water (H₂O). Chemicals are found everywhere—inside our bodies, in the air, in food, and in products we use daily. They interact and react based on their properties, forming new substances or breaking down old ones. Understanding chemicals helps us make sense of how things work, from medicine and cleaning products to environmental processes, ensuring safe and effective use in everyday life.