Concept information
Terme préférentiel
element abundance
Définition(s)
- The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by the mass-fraction (the same as weight fraction); by the mole-fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases); or by the volume-fraction. Volume-fraction is a common abundance measure in mixed gases such as planetary atmospheres, and is similar in value to molecular mole-fraction for gas mixtures at relatively low densities and pressures, and ideal gas mixtures. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elements)
Concept(s) générique(s)
Synonyme(s)
- elemental abundance
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/MDL-HK54TLZJ-G
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