Argon was discovered by Sir William Ramsay, a Scottish chemist, and Lord Rayleigh, an english chemist, in 1894. Argon makes up .93% of the Earth's atmoshpere, making it the third most abundant gas. It is obtained from the air as the byproduct of the production of oxygen and nitrogen.
Silver- People have been using silver for 5000 years. The discoverer of Silver is unknown. It can be obtained by pure deposits, fromn silver ores, and in conjuction with deposits of ores containing lead, gold, or copper
Gold- It has been know for atleast 5500 years. It is found free in nature but it is usaually found in conjuction with silver, quratz, calcite, lead, tellurium, zinc, or copper. It is the most malleabl and ductile of all the elemnts. Pure gold is soft.
Sodium- It is the sixth most abundunt element in the world. It comprises 2.6% of the Earth's crust. It is never found free in nature. Pure sodium was first isolated by Sir Humphry Davy in 1807 through the electrolysis of caustic sodium.
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