Lithium (pronounced /?l??i?m/ ) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver-white color. Under standard conditions , it is the lightest metal and the least dense solid element. plus

Lithium (pronounced /?l??i?m/ ) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver-white color. Under standard conditions , it is the lightest metal and the least dense solid element. Like all alkali metals, lithium is highly reactive, corroding quickly in moist air to form a black tarnish . For this reason, lithium metal is typically stored under the cover of oil . [ 1 ] When cut open, lithium exhibits a metallic lustre , but contact with oxygen quickly returns it back to a dull silvery grey color. Lithium is also highly flammable. less