What is the name for the group of elements that are particularly unreactive?

Answer 1

#"The Group 18 elements"#

The helium, neon, argon group were once known as the #"Noble Gases"# as they were thought to be inert, and hence did not undergo reaction with the other (common) elements. These days, a few Noble gas compounds are known, but notably with fluorine and oxygen, which are the most reactive elements on the Periodic Table.

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Answer 2

Cooper Adams

The noble gases are that particular class of elements that are extremely non-reactive.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.