This chart "https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elements#/media/File:Element_abundance_earth_ppm_chart.svg" would imply that Prof Sheehan used a unique basis for his graphic. Not molar or mass... volume at stp perhaps?
Searching for the source of the chart shows that is has been passed down unaltered from time immemorial (i.e. 1970) without much criticism. Metasynthesis (whoever they are) remarks: [However, we dispute the relative areas given to the various elements; there is almost no helium at the Earth's surface, for example.]
These are of course abundances on Earth's surface. Otherwise it would pretty much be a "H" blob with notable "He" and an thin skein of all the "metals" (so called).
4 comments:
On a molar or mass basis?
@Guy I don't know. The reference is there is you'd like to look it up.
This chart "https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elements#/media/File:Element_abundance_earth_ppm_chart.svg" would imply that Prof Sheehan used a unique basis for his graphic. Not molar or mass... volume at stp perhaps?
Searching for the source of the chart shows that is has been passed down unaltered from time immemorial (i.e. 1970) without much criticism. Metasynthesis (whoever they are) remarks: [However, we dispute the relative areas given to the various elements; there is almost no helium at the Earth's surface, for example.]
These are of course abundances on Earth's surface. Otherwise it would pretty much be a "H" blob with notable "He" and an thin skein of all the "metals" (so called).
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