The Avogadro constant or (the Avogadro number earlier) is the number of elementary units in one mole of any substance. The Avogadro constant is denoted as N A. It has the dimension of the reciprocal amount of substance (mol −1). The approximate value of N A is 6.022 × 10 23 mol −1.

The Avogadro constant, N A (originally called Avogadro's number), is the number of atoms in exactly 12 kg of carbon-12. The 2006 value is The 2006 value is N A = 6 .0 22 1 × 1 0 26 atoms / kgmole = 2 . 731 6 × 1 0 26 atoms / lbmole

Avogadro constant: Numerical value: 6.022 140 76 x 10 23 mol-1: Standard uncertainty (exact) Relative standard uncertainty (exact) Concise form 6.022 140 76 x 10 23 mol-1 : Click here for correlation coefficient of this constant with other constants

Avogadro's Number. Avogadro’s number tells us the number of particles in 1 mole (or mol) of a substance. These particles could be electrons or molecules or atoms. The value of Avogadro’s number is approximately 6.022140857×1023 mol−1.

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Avogadro's Constant. One mole of oxygen atoms contain s 6.02214179 × 10 23 oxygen atoms. Also, one mole of nitrogen atoms contain s 6.02214179 × 10 23 nitrogen atoms. The numb er 6.02214179 × 10 23 is cal led Avogadro's number ( N A) or Avogadro's constant, after the 19th century scientist Amedeo Avogadro.

Avogadro's number, or Avogadro's constant, is the number of particles found in one mole of a substance. It is the number of atoms in exactly 12 grams of carbon-12. This experimentally determined value is approximately 6.0221 x 10 23 particles per mole. Avogadro's number may be designated using the symbol L or N A. Note that Avogadro's number, on its own, is a dimensionless quantity.