Question

why several metals were discovered around 1800 AD​

Answer 1

Answer:

People first began making things from metal over 9000 years ago, when they discovered how to get copper from its []ore. They then learned how to make a harder alloy, bronze, by adding tin to the copper. About 3000 years ago, they discovered iron.

Answer 2

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Each with distinct properties, Prehistoric man discovered that some metals were more useful for certain jobs and they began to specify particular metals for applications. For example; Gold and silver are very soft and were therefore predominantly used for decoration and bullion for trade.