IUPAC Gold Book - Quantities

Quantities

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

quantity	symbol	referenced in	equation
absolute activity, $λ$	$Math - math$	absolute activity, $λ$	$λ$
		absolute activity, $λ$	$λ = e μ R T$
absolute lethal concentration ( $LC 100$ )	$Math - math$	absolute lethal concentration ( $LC 100$ )	$LC 100$
absolute lethal dose ( $LD 100$ )	$Math - math$	absolute lethal dose ( $LD 100$ )	$LD 100$
absorbance, $A$	$Math - math$	absorbance, $A$	$A$
		absorbed (spectral) photon flux density	$q p , λ 0 1 − 10 − A λ V$
		absorbed (spectral) photon flux density	$q n , p , λ 0 1 − 10 − A λ V$
		absorbed (spectral) photon flux density	$A λ$
		absorbed (spectral) radiant power density	$P λ 0 1 − 10 − A λ V$
		isosbestic point	$A λ l −1 = ∑ i = 1 n ɛ i λ c i$
		isosbestic point	$A λ$
		quantum yield, $Φ$	$Φ λ = d x / d t q n , p 0 1 − 10 − A λ$
		quantum yield, $Φ$	$A λ$
	$Math - math$	absorbance, $A$	$A 10$
	$Math - math$	absorbance, $A$	$A e$
absorbed (spectral) photon flux density	$Math - math$	absorbed (spectral) photon flux density	$q p , λ$
	$Math - math$	absorbed (spectral) photon flux density	$q n , p , λ$
	$Math - apply$	absorbed (spectral) photon flux density	$q p , λ 0 1 − 10 − A λ V$
	$Math - apply$	absorbed (spectral) photon flux density	$q n , p , λ 0 1 − 10 − A λ V$
	$Math - math$	spectral photon flux (photon irradiance), $E p λ$	$E p λ$
absorbed (spectral) radiant power density	$Math - apply$	absorbed (spectral) radiant power density	$P λ 0 1 − 10 − A λ V$
absorptance, $α$	$Math - math$	absorptance, $α$	$α$
		absorptance, $α$	$α ≤ 1$
		absorptance, $α$	$α ≈ A e$
		decadic absorbance, $A$	$A = − log 10 ( 1 − α )$
absorption cross-section, $σ$	$Math - math$	absorption cross-section, $σ$	$σ$
		conversion cross-section	$σ Φ$
acceleration, $a$
acceleration of free fall, $g$	$Math - math$	acceleration of free fall, $g$	$g$
acceptable daily intake ( $ADI$ )	$Math - math$	acceptable daily intake ( $ADI$ )	$ADI$
acceptor number ( $AN$ )	$Math - math$	acceptor number ( $AN$ )	$AN$
actinic flux $S λ$	$Math - math$	actinic flux $S λ$	$S λ$
activation energy (Arrhenius activation energy)	$Math - apply$	activation energy (Arrhenius activation energy)	$E a = R T 2 d ( ln k ) d T$
	$Math - apply$	compensation in catalysis	$k = A e − E R T$
		compensation in catalysis	$E$
activity, $A$ of a radioactive material	$Math - math$	activity, $A$ of a radioactive material	$A$
		activity, $A$ of a radioactive material	$A = − d N d t$
activity coefficient, $f$ , $γ$	$Math - math$	activity coefficient, $f$ , $γ$	$f$
	$Math - math$	activity coefficient, $f$ , $γ$	$γ$
activity (relative activity), $a$	$Math - math$	activity (relative activity), $a$	$a$
		activity (relative activity), $a$	$a = e μ − μ 0 R T$
affinity of reaction, $A$	$Math - math$	affinity of reaction, $A$	$A$
amount concentration, $c$	$Math - math$	amount concentration, $c$	$c$
		molar absorption coefficient, $ɛ$	$ɛ λ = 1 c l lg ( P λ 0 P λ ) = A λ c l$
		molar absorption coefficient, $ɛ$	$c / mol dm −3$
amount fraction, $x$ ( $y$ for gaseous mixtures)	$Math - math$	amount fraction, $x$ ( $y$ for gaseous mixtures)	$x$
	$Math - math$	amount fraction, $x$ ( $y$ for gaseous mixtures)	$y$
amount of substance, $n$	$Math - math$	amount of substance, $n$	$n$
		conditional (formal) potential	$E cell = E c 0 ' − R T n F ∑ i ν i ln c i$
angle	$Math - math$	magic angle	$β$
		magic angle	$I t β ∝ N t 1 + ( 3 cos 2 ⁡ β − 1 ) R t$
		magic angle	$β = 54.7 °$
		magic angle	$I t β = 54.7 ° ∝ N t$
		magic angle	$I β ∝ N 1 + ( 3 cos 2 ⁡ β − 1 ) R$
		magic angle	$I β$
angle of optical rotation, $α$	$Math - math$	angle of optical rotation, $α$	$α$
angular frequency, $ω$	$Math - math$	angular frequency, $ω$	$ω$
		frequency, $ν$ , $ω$ in photochemistry	$ω$
angular momentum, $L$	$Math - math$	angular momentum, $L$	$L$
		angular momentum, $L$	$L = r × p$
atomic mass $m a$	$Math - math$	atomic mass $m a$	$m a$
atomic number, $Z$	$Math - apply$	atomic charge	$ζ = Z A − q A$
		atomic charge	$Z A$
	$Math - math$	atomic number, $Z$	$Z$
attenuance, $D$	$Math - math$	attenuance, $D$	$D$