Avogadro's Number
| Formula / Notation | Nₐ = 6.02214076 × 10²³ mol⁻¹ |
|---|---|
| Also Known As | Avogadro constant; Nₐ; L (Loschmidt notation); 6.022 × 10²³; mole constant |
What is Avogadro's Number?
Avogadro's number (Nₐ, also called the Avogadro constant) is the number of particles (atoms, molecules, or ions) in one mole of a substance. Its exact value is 6.02214076 × 10²³ mol⁻¹ (defined exactly since 2019 SI redefinition). It connects the macroscopic and atomic scales of chemistry and is fundamental to all mole-based calculations.
Formula & Notation
Other Names / Synonyms: Avogadro constant; Nₐ; L (Loschmidt notation); 6.022 × 10²³; mole constant
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
Avogadro's number (Nₐ, also called the Avogadro constant) is the number of particles (atoms, molecules, or ions) in one mole of a substance. Its exact value is 6.02214076 × 10²³ mol⁻¹ (defined exactly since 2019 SI redefinition). It connects the macroscopic and atomic scales of chemistry and is fundamental to all mole-based calculations.
Mole calculations in stoichiometry; converting between moles and number of particles; relating macroscopic and atomic masses; gas law calculations; thermodynamics (Boltzmann constant: k_B = R/Nₐ); all quantitative chemistry
No hazard — a fundamental constant.
The formula or notation for Avogadro's Number is: Nₐ = 6.02214076 × 10²³ mol⁻¹