Lithium on being heated in air mainly forms the monoxide and not the peroxide. Why?

Lithium on being heated in air mainly forms the monoxide and not peroxide

Explain why : Lithium on being heated in air mainly forms the monoxide and not peroxide.

State as to why (a) Alkali metals show only +1 oxidation state (b) Na and K impart colour to the flame but Mg does not.lt (c) Lithium on being heated in air mainly forms the monoxide and not the peroxide (d) Li is the best reducing agent in aqueous solution

Explain why: (a) Lithium on being heated in air mainly forms the monoxide and not peroxide. (b) An aqueous solution of sodium carbonate gives alkaline test.

When lithium is heated in air mainly forms the monoxide and not peroxide. Why?

Lithium forms monoxide only when heated in oxygen. Sodium forms monoxide and peroxide in excess of oxygen. Other alkali metals form superoxide with oxygen i.e MO_(2) . The abnormal behaviour of lithium is due to small size. The larger size of nearer alkali metals also decides the role in formation of superoxides. The three ions are related to each other as follows O^(2-) overset(1/2O_(2))rarrunderset(O_(2^(2-)))overset(O_(2))rarrunderset("superoxide ion")2O_(2) Lithium does not form stable peroxide because

Which of the following elements can form only monoxide and not peroxide and superoxide ?