Gold Book Terms (1232) from the Physical and Biophysical Chemistry Division (I)

absolute activity 

absolute electrode potential 

absorbance 

absorptance 

absorption coefficient 

absorption cross-section 

absorption factor 

absorption intensity 

abstraction process 

abundance sensitivity 

accelerating voltage scan 

acceleration 

activated adsorption process 

activation 

activation energy 

activation 

activation reaction 

active centre 

active metal 

active site 

active state 

activity 

activity 

activity coefficient 

activity 

adduct ion 

adhesional wetting 

adiabatic 

adiabatic ionization 

adiabatic transition-state theory 

adiabatic treatments of reaction rates 

adsorption capacity 

adsorption complex 

adsorption hysteresis 

adsorption isobar 

adsorption isostere 

adsorptive 

advancement 

affinity of reaction 

agglomerate 

aggregate 

amount concentration 

amount fraction 

amount of substance 

amount-of-substance concentration 

amount-of-substance fraction 

ampere 

amphipathic 

angle 

angle of optical rotation 

angular distribution 

angular frequency 

angular momentum 

anode 

anodic transfer coefficient 

anti-thixotropy 

apparent viscosity 

appearance energy 

appearance potential 

area of interface 

area viscosity 

Arrhenius A factor 

Arrhenius equation 

association reaction 

associative ionization 

associative surface reaction 

asymmetric film 

atmosphere 

atmospheric pressure ionization [obsolet 

atom–molecule complex mechanism 

atomic mass 

atomic number 

atomic orbital 

atomic weight 

attenuance 

attenuation coefficient 

atto 

attractive potential-energy surface 

attractive–mixed–repulsive classification 

auto-ionization 

autophobicity 

autopoisoning 

average current density 

α-cleavage 

α-particle