Atom vs Molecules

Atom
An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, surrounded by electrons in various energy levels. Atoms are the building blocks of all matter in the universe.

Molecules
Molecules are formed when two or more atoms chemically bond together. These bonds can be covalent or ionic, depending on how the atoms share or transfer electrons. Molecules can be composed of atoms of the same element (such as O2) or different elements (such as H2O).

Differences
- Composition: Atoms are individual particles, while molecules are made up of two or more atoms bonded together.
- Size: Atoms are smaller in size compared to molecules.
- Stability: Atoms are stable on their own, while molecules are more stable when bonded together.
- Chemical Properties: Atoms have specific chemical properties based on their atomic number, while molecules have unique properties based on their composition and structure.
- Formation: Atoms combine to form molecules through chemical bonding.
In summary, atoms are the basic units of elements, while molecules are formed when atoms chemically bond together. Both play essential roles in the composition and behavior of matter in the universe.