molekler

A molecule is a group of two or more atoms held together by chemical bonds. These atoms can be of the same element, such as in an oxygen molecule (O2), or they can be of different elements, as in a water molecule (H2O). Molecules are the smallest particles of a chemical compound that retain the chemical properties of that compound.

The forces that hold atoms together in a molecule are called chemical bonds. The most common types of chemical bonds are covalent bonds, where atoms share electrons, and ionic bonds, where atoms transfer electrons. The arrangement of atoms within a molecule determines its shape and its physical and chemical properties. For example, the bent shape of a water molecule is crucial to its ability to dissolve many substances.

Molecules are fundamental to all matter. They are the building blocks of substances, from simple gases like helium (He) to complex biological structures like DNA. The study of molecules, their structure, properties, and reactions, is the domain of chemistry. Understanding molecules is essential for comprehending the world around us, from the air we breathe to the food we eat and the medicines we use. The concept of molecules allows us to explain a vast range of phenomena at the atomic and subatomic level.