Atom
| Formula / Notation | ¹²₆C (atomic symbol notation) |
|---|---|
| Also Known As | Basic unit of matter, atomic particle, element unit; from Greek: atomos (indivisible) |
What is Atom?
An atom is the smallest unit of a chemical element that retains the chemical properties of that element. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in energy levels or orbitals. Atoms combine to form molecules and compounds through chemical bonds, and are the fundamental building blocks of all matter.
Formula & Notation
Other Names / Synonyms: Basic unit of matter, atomic particle, element unit; from Greek: atomos (indivisible)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
An atom is the smallest unit of a chemical element that retains the chemical properties of that element. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in energy levels or orbitals. Atoms combine to form molecules and compounds through chemical bonds, and are the fundamental building blocks of all matter.
The atomic theory underpins all of chemistry, materials science, and physics. Understanding atomic structure guides the design of catalysts, semiconductors, pharmaceuticals, and new materials. Isotopic variations of atoms are used in radiometric dating, medical imaging, and tracer studies.
Atoms of unstable (radioactive) isotopes emit ionising radiation and require radiation safety measures. Handling reactive atoms or highly reactive elemental substances (e.g., sodium, fluorine) requires specialised PPE and procedures.
The formula or notation for Atom is: ¹²₆C (atomic symbol notation)