Atoms and Molecules

Atoms are the fundamental building blocks of matter, consisting of a nucleus made of protons and neutrons, surrounded by electrons in energy levels. Molecules are formed when two or more atoms bond together, either through covalent or ionic bonds. The arrangement of atoms in a molecule determines its properties. Understanding atoms and molecules is crucial in chemistry as it helps explain how substances interact, react, and change, forming the basis for all chemical reactions and compounds in our environment.