molecules

Molecules are the fundamental building blocks of all matter. They consist of two or more atoms bonded together, which can be the same (like oxygen gas, O2) or different (like water, H2O). Atoms are the tiny units that make up elements, such as hydrogen or carbon. When atoms combine to form molecules, they create substances with unique properties. For example, the arrangement and type of atoms in a molecule determine whether it is a gas, liquid, or solid, and dictate its behavior in chemical reactions. In essence, molecules are crucial to understanding the composition of everything around us.