element abundance

The abundance of a chemical element measures how relatively common the element is, or how much of the element there is by comparison to all other elements. Abundance may be variously measured by the mass-fraction (the same as weight fraction), or mole-fraction (fraction of atoms, or sometimes fraction of molecules, in gases), or by volume fraction. Measurement by volume-fraction is a common abundance measure in mixed gases such as atmospheres, which is close to molecular mole-fraction for ideal gas mixtures (i.e., gas mixtures at relatively low densities and pressures).
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Die Elementhäufigkeit unterscheidet sich je nach Bereich, den man betrachtet: Das im Universum mit Abstand häufigste Element, Wasserstoff, ist auf der Erde in elementarer Form praktisch nicht vorhanden, aber in vielen Verbindungen, allem voran Wasser.
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Распространённость химических элементов — число ядер каждого элемента в веществе, приходящееся на определенное число ядер эталонного элемента. В качестве эталонного элемента обычно выбирают водород или кремний.
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zastupljenost elemenata  

zastupljenost elemenata