Question

Why were the noble gas gases and their compounds discovered late

Answer 1

Because most elements discovered through their reactivity with other elements, typically with oxygen , it was difficult for scientists to work with a substance that seems to have little or no chemical properties based upon the lack of reactivity

Answer 2

Thecomponds of noble gases were discovered late because most elements were discovered through their reactivity with other elements, typically with oxygen, it was difficult for scientists to work with a substance that seemed to have little or no chemical properties based on the lack of reactivity.