Molecule
| Formula / Notation | Smallest particle of an element/compound; N_A = 6.022×10²³ molecules/mol |
|---|---|
| Also Known As | Molecular unit, chemical molecule, covalent molecule, polyatomic molecule |
What is Molecule?
The smallest unit of a covalent compound that retains its chemical identity. Molecules consist of two or more atoms held together by covalent bonds. Diatomic molecules (H₂, O₂, N₂) contain two atoms; polyatomic molecules contain more than two atoms.
Formula & Notation
Other Names / Synonyms: Molecular unit, chemical molecule, covalent molecule, polyatomic molecule
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
The smallest unit of a covalent compound that retains its chemical identity. Molecules consist of two or more atoms held together by covalent bonds. Diatomic molecules (H₂, O₂, N₂) contain two atoms; polyatomic molecules contain more than two atoms.
The molecule concept is the basis of all molecular chemistry: drug-receptor interactions require the correct molecular structure; polymer chains are linked molecules; biochemical processes involve molecular recognition; analytical chemistry identifies specific molecules in mixtures.
Individual molecules of toxic substances are responsible for their hazardous effects: a molecule of sarin binds to acetylcholinesterase; a molecule of benzene intercalates into DNA. Understanding molecular structure and reactivity is fundamental to all chemical safety assessment.
The formula or notation for Molecule is: Smallest particle of an element/compound; N_A = 6.022×10²³ molecules/mol