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_of_the_chemical_elements.
2007-12-22 14:41:33
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answer #1
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answered by moonspot318 5
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The first element to exist in the universe is Hydrogen (1 proton). After the Big Bang, protons as well as other subatomic particles were blown out in all directions at immense speeds and temperatures. These particles collided and began fusing together, remember that tremendously high temperatures are needed to fuse particles. As two Hydrogen atoms fuse together, Helium (2 protons) is produced. This process continues all the way to Iron (with 26 protons), that is the heaviest element that can be produced via stellar phenomena.
Elements heavier than Iron only come into existence through the right "planet creating" conditions.
2007-12-24 16:46:27
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answer #2
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answered by Mr. Weather 6
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the basics, Carbon, Oxygen, Silicon, Nitrogen, and Hydrogen made forth at the beginning of time and created and changed earth. Scientific findings showed the ages of matter with the half-life cycling of carbon and its breakdown, as they have with uranium and lead.
2007-12-22 22:46:47
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answer #3
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answered by palovebunny 2
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H2O is not an element, and no one thought to mention iron?
2007-12-23 02:09:50
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answer #4
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answered by Thomas E 7
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Try the Periodic Table.
Just because man didn't know they were around doesn't mean they didn't exist.
2007-12-22 22:39:15
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answer #5
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answered by Lonnie P 7
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AIR EARTH FIRE and WATER
SPIRIT was the 5th element added by the ancient greeks.
Evidence? Look it up!
2007-12-22 22:40:00
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answer #6
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answered by keshequa87 6
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