Question

Give the reason for the late discovery of noble gases

Answer 1

the non reactive nature of noble gases was the reason for their late Discovery

Answer 2

the reasons includes -

most of the element were discovered by their reactivity with other metals and since  noble gases have stable electronic configuration .

being inert , they are not present in compouds 

they are minor components of air  i.e, they are found in traces.


     hope this helps u...