where was argon
It's funny how it took scientists until 1894 to discover the most common noble gas on Earth. That's right, argon (Ar) makes up a little over one percent of our atmosphere. Lord Rayleigh and Sir William Ramsay discovered and isolated argon gas, but we joke about how long it took. They could never have done it earlier, because the technology wasn't available. We say that today's scientists are on the cutting edge and discovering elements that will have atomic numbers over 120.