The compound(s) formed upon combustion of sodium metal in excess air is (are) :

Sodium oxide and sodium peroxide are the compound(s) produced when sodium metal burns when there is too much air present.
The simple oxide formation equation is as follows:

$4\mathrm{Na}+{\mathrm{O}}_2\to 2{\mathrm{Na}}_2\mathrm{O}$

$2\mathrm{Na}+{\mathrm{O}}_2\to {\mathrm{Na}}_2{\mathrm{O}}_2$