Avogadro's number

The Avogadro's number is a fixed numerical value equal to the number of constituent particles contained within one of substance. It is precisely equal to \(6.02214076 \times 10^{23}\).Bureau International des Poids et Mesures (2019) The International System of Units (SI) 9th edition. ISBN 978-92-822-2272-0 p.134. It is currently used to define mole.
A related term is Avogadro constant, denoted as \(N_A\), which is equal to \(6.02214076 \times 10^{23}\) mol-1.CODATA Value: Avogadro constant
Before , the Avogadro constant was defined as the number of atoms in 12 grams of , and was approximetaly equal to \(6.022140857 \times 10^{23}\text{ mol}^{-1}\).
== Approximations ==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(6.02214076\times10^{23}\) (exact) 	\(6.02214076\times10^{23}\) (exact)
Arrow notation 	\(5\uparrow34\) 	\(2\uparrow79\)
Steinhaus-Moser Notation 	18[3] 	19[3]
Copy notation 	5[24] 	6[24]
Taro's multivariable Ackermann function	A(3,75) 	A(3,76)
Pound-Star Notation 	#*(2,1,2,3)*5 	#*(3,1,2,3)*5
BEAF 	{5,34} 	{2,79}
Hyper-E notation 	6E23 	E[2]79
Bashicu matrix system 	(0)(0)(0)[938] 	(0)(0)(0)[939]
Hyperfactorial array notation 	23! 	24!
Fast-growing hierarchy 	\(f_2(72)\) 	\(f_2(73)\)
Hardy hierarchy 	\(H_{\omega^2}(72)\) 	\(H_{\omega^2}(73)\)
Slow-growing hierarchy 	\(g_{\omega^{17}20+\omega^{15}20}(21)\)	\(g_{\omega^{17}20+\omega^{16}}(21)\)
== Sources ==
== See also ==
zh:亞佛加厥數
Category:Numbers
Category:Class 2
Category:Eponymous numbers
Category:Even numbers
Category:Non-powers
Category:Numbers with 7 to 29 digits
Category:Numbers with peer-reviewed source
ja:アボガドロ数