阿伏伽德罗常数
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/avogadro-number-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/avogadro-number-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/avogadro-number-def/)Use the native HTML custom element.
定义
一摩尔物质中基本实体（原子、分子或离子）的精确数目：6.02214076 × 10²³ /mol。
解释
One mole of carbon-12 atoms weighs exactly 12 grams and contains 6.022 × 10²³ atoms. This enormous number bridges atomic-scale masses and laboratory-scale masses: one water molecule has a mass of 2.99 × 10⁻²⁶ kg, but one mole of water (18.015 g) is easily measured on a balance. Since 2019, Avogadro’s number is fixed by definition, making the mole independent of any physical artifact.
RELATED ARTICLES
A complete guide to the four temperature scales in scientific and everyday use—Celsius, Fahrenheit, Kelvin, and Rankine—including their history, conversion formulas, and where they intersect.
Speed Units Guide: MPH, KM/H, Knots, and MachA complete reference for speed units used around the world — from everyday driving speeds to the velocity of light.
Energy Units Guide: Joules, Calories, BTU, and Kilowatt-HoursA complete reference for energy units across physics, food science, electrical engineering, and fuel — with key conversions and real-world examples.