Question

write two reasons responsible for late Discovery of noble gases

Answer 1

1) Technology was not advanced enough
2)Noble gases have little or no chemical reactivity making it difficult for scientists to acknowledge their presence

Answer 2

Hey friend.....!

The nobles gases are the elements located on the very right of the periodic table. The elements are Helium, Neon, Argon, Krypton, Xenon and Radon. The common thing with the noble gases is that they have full outer shells, and don't react with any elements.

Noble gases were discovered later than other elements , simply because they were extremely unreactive . Being intert they were difficult to isolate via chemical reactions .

I hope this will help you