Question

why noble gases and noble metals doesn't react with oxygen to form oxide

Answer 1

Answer:

the valency of Nobel gases are 0 so they do not react with any other elements

and nobel metals does not make oxide because it is the least reactive metal - it is extracted from the ground in its pure form while other metals have to go through expensive industrial processes to extract metal from its ore.

Explanation:

list of nobel metals is given

does not make oxide because it is the least reactive metal - it is extracted from the ground in its pure form while other metals have to go through expensive industrial processes to extract metal from its ore.

though there are some expections like Xe which due to its bigger size forms oxides as size of atom increases electrons becomes reactable. as nuclear charge decreases.