Chemistry — Metal Extraction vs Reactivity

Extraction method follows position in the reactivity series.

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digraph Extraction {
  rankdir=LR;
  node [shape=box, style=rounded];
  "Very reactive (K, Na, Al)" -> "Electrolysis";
  "Moderately reactive (Zn, Fe)" -> "Reduction with carbon";
  "Unreactive (Au, Pt)" -> "Found native";
}