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AR-GON 
It's funny how it took scientists until 1894 to discover the most common inert gas on Earth. That's right; argon makes up a little over one percent of our atmosphere. Lord Rayleigh and Sir William Ramsay discovered and isolated argon gas. We joke. They could have never done it earlier because the technology wasn't available. In the same way that today's scientists are on the cutting edge of discovering elements with the atomic numbers over 110, they were on the cutting edge a century ago. Once isolated, argon was not that special. It has no smell and not color. It wound up as the last element in period three at position number eighteen. As usual, the last element in the row is an inert gas. Argon is in the same family as helium and neon. For a long time, scientists thought that Argon did not combine with any other elements. They were wrong. See? Even scientists don't always get the right answer!
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