# Avogadro constant facts for kids

Value of N_{A} in various units |
---|

14179(30)×10^{23} mol 6.022^{−1} |

59757(14)×10^{26} lb-mol 2.731^{−1} |

248479(85)×10^{25} oz-mol 1.707^{−1} |

The **Avogadro constant** (symbols: **L**, **N _{A}**) is the number of particles (usually atoms or molecules) in one mole of a given substance. Its value is equal to 14129(27)×10

^{23}mol

^{−1}. The constant was named after the 6.022Italian scientist Amedeo Avogadro.

The measurement of Avogadro's constant was refined in 2011 to ×10^{23} ± 6.02214078×10^{23}. 0.00000018

An old term closely related to the Avogadro constant is Avogadro's number. **Avogadro's number** is the number of atoms in 12 grams of the carbon isotope carbon-12. Avogadro's number is a dimensionless quantity and has the numerical value of the Avogadro constant given in base units.

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Avogadro constant Facts for Kids. *Kiddle Encyclopedia.*