Zinc is a metal, and was known as an essential trace element because humans need only small amounts in order for our bodies to function properly. It was Marco Polo (1254-1324) from Venice who reported the production of zinc oxide in Persia.
Zinc is a metal, and was known as an essential trace element because humans need only small amounts in order for our bodies to function properly. It was Marco Polo (1254-1324) from Venice who reported the production of zinc oxide in Persia.
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