why does copper react when joined with oxygen???please can someone answer this question as soon as possible
Do you mean oxidation, as in rusting?
Ehr. Because the reaction with oxygen is spontaneous to form copper oxide.
copper is the least reactive metal and does not burn in air even on heating. However, on prolonged strong heating copper reacts with oxygen and forms copper (II) oxide (CuO) outside and copper (I) oxide (Cu 2 O) inside.
