Which among the following elements are inert to oxygen at room temperature?
A.
B.
C.
D.
A only
B only
C and D only
A and B only
and
are inert to oxygen due to the formation of an oxide film on their surface. So, the correct answer will be option (A) and (B).
Calcium, strontium and barium readily reacts with air to form oxides and nitrides.