25 dezembro 2018

The Discovery of Metals

There were seven known metals until the 1200s CE: gold, silver, copper, tin, lead, iron, and mercury. These were the metals that built humanity’s first civilizations. (For those who point out the Bronze Age from about 3300 BCE to 1200 BCE, bronze is a mix of copper and tin.)

Arsenic was discovered in the 1200s, antimony in the 1400s, and things just took off from there. Today there are 86 known metals.

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