A molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Molecules are formed when two or more atoms join together through chemical bonds. These bonds can be covalent, where atoms share electrons, or ionic, where atoms transfer electrons to form charged ions that attract each other.

Molecules can vary in size and complexity. They can consist of just two atoms, as in the case of diatomic molecules like oxygen (O2) or hydrogen (H2), or they can contain hundreds or even thousands of atoms, as in complex organic molecules like proteins or DNA.

Molecules can exist in various states of matter, including solids, liquids, and gases, depending on the nature of the atoms and the type of bonds present. They play a crucial role in chemistry, biology, and materials science, influencing the properties and behavior of substances in the world around us.

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