Until the early 1960s the group 8a elements were called the


Question: 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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Chemistry: Until the early 1960s the group 8a elements were called the
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