" For 10 points, name this family of elements that includes xenon, argon, krypton, and helium, which is found at the extreme right of the periodic table.
One element in this family was originally isolated by heating clevite, while the first isolated element in this family was discovered when Lord Rayleigh and William Ramsay noted that a sample of pure nitrogen air was too heavy to be just nitrogen. Neil Bartlett was the first chemist to make a compound containing one of these elements, which had previously been thought to be "inert." For 10 points, name this family of elements that includes xenon, argon, krypton, and helium, which is found at the extreme right of the periodic table.
One element in this family was originally isolated by heating clevite, while the first isolated element in this family was discovered when Lord Rayleigh and William Ramsay noted that a sample of pure nitrogen air was too heavy to be just nitrogen.
{noble gases} [or {inert gases;} or Group {VIIIA} ({eight}-{A}); or Group {18}]