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Abundance (atom fraction) of the chemical elements in Earth's upper continental crust as a function of atomic number; [5] siderophiles shown in yellow. Graphs of abundance against atomic number can reveal patterns relating abundance to stellar nucleosynthesis and geochemistry.
The abundance of the chemical elements is a measure of the occurrences of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by mass fraction (in commercial contexts often called weight fraction), by mole fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases), or by volume fraction.
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English: Bar chart of cumulative carbon dioxide CO₂ emissions by country (1850–2021) Data source: Evans, Simon Analysis: Which countries are historically responsible for climate change? / Historical responsibility for climate change is at the heart of debates over climate justice.. CarbonBrief.org. Carbon Brief (5 October 2021).
Alekseenko V.A., Alekseenko A.V. (2013) Chemical elements in geochemical systems. The abundances in urban soils. Publishing House of Southern Federal University, Rostov-on-Don (388 pp., in Russian with English Abstract). ISBN 978-5-9275-1095-5; Vladimir Alekseenko, Alexey Alekseenko (2014) The abundances of chemical elements in urban soils ...
Three graphs portray the evolution of its peatland carbon content over the past 20,000 years, as reconstructed from three peat cores. In 2017, it was discovered that 40% of the Cuvette Centrale wetlands are underlain with a dense layer of peat, which contains around 30 petagrams (billions of tons) of carbon. This amounts to 28% of all tropical ...
The following molar volumes and densities for the majority of the gaseous elements were calculated from the van der Waals equation of state, using the quoted values of the van der Waals constants. The source for the van der Waals constants and for the literature densities was: R. C. Weast (Ed.), Handbook of Chemistry and Physics (53rd Edn ...