Until the early 1960s the group 8A elements were called the inert gases; before that
Chapter 7, Problem 7.79(choose chapter or problem)
Until the early 1960s the group 8A elements were called the inert gases; before that they were called the rare gases. The term rare gases was dropped after it was discovered that argon accounts for roughly 1% of Earth's atmosphere. (a) Why was the term inert gases dropped? (b) What discovery triggered this change in name? (c) What name is applied to the group now?
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