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Sn is the chemical symbol for the metal Tin.

Towards the end of the period referred to by archaeologists as the Stone Age, skilled metal workers discovered that adding a small ammount of tin to copper produced a metal which was harder and more durable than the pure copper they had been using for making tools etc. This alloy is now known as Bronze, and the invention of it started the next period which archaeologists refer to as the Bronze Age. This all happened approximately 5000 years ago, or 3000 BC.

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15y ago

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