What is black lithium oxide? Please hurry. Only 2 days till my report is due. Thanks!?

Question

My report is due on Wednesday January 10, 2007.

Answer 1

Lithium reacts with oxygen from the air to form black lithium oxide (Li2O). It therefore has to be stored under the cover of oil to stop this oxidation reaction from occurring. It tarnishes and oxidizes very rapidly in air and water.

From http://en.wikipedia.org/wiki/Lithium