The noble gases in group 18 were some of the last natural elements to be discovered. Why do you think this is so?

because they were extremely un-reactive. Being inert, they were difficult to isolate via chemical reactions, thus difficult to distinguish as separate elements

Explanation:

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pstnonsonjoku pstnonsonjoku · Answer 2 · 2021-09-04T13:38:35+02:00

The noble gases of group 18 were the last to be discovered because they are highly unreactive or inert.

Noble gases refer to elements in group 18. These elements are renowned for being inert.

As a result of their inertness and because they are all gases, they are sometimes called "inert gases".

This chemical inertness made it difficult to discover these elements until lately. Many natural elements were discovered because they participate in chemical reactions. Hence, inert gases became the last natural elements to be discovered.

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