science-junkie: Elements According to Relative Abundance A 1970 periodic table by Prof. Wm. F. Sheehan of the University of Santa Clara that claims to show the elements according to relative abundance at the Earth’s surface. Source: Periodic Table

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science-junkie: Elements According to Relative Abundance A 1970 periodic table by Prof. Wm. F. Sheehan of the University of Santa Clara that claims to show the elements according to relative abundance at the Earth’s surface. Source: Periodic Table

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