What are some of the oldest known elements?
I am assuming you mean the elements known for the longest time, rather the elements known to have existed the longest (hydrogen and helium). These would be primarily the metals used to make tools and weapons, plus carbon and sulfur, two of the materials used to make the metals. Besides carbon and sulfur, this would mean copper, lead, tin, iron, lead, gold and silver, mercury and perhaps platinum. Some evidence is simply the ages named after some of these metals. They have been known since ancient times. You may find out more about this at wikipedia. Check it out here http://en.wikipedia.org/wiki/Discovery_o…
