# When sodium is oxidized it forms_______

When sodium is oxidized it forms sodium peroxides.

2Na + O2 →Na2O2 (peroxides)

When sodium metal is heated in the presence of free supply of air sodium peroxide is formed along with the small quantity of sodium oxide.

4Na + O2→ 2Na2O (minor product)
Na2O + 1/2O2→Na2O2(major product)