Lanthanum is a malleable, ductile, and soft metal that oxidizes rapidly when exposed to air.

Since radium oxidizes rapidly in air and decomposes in water, the salt form is the preferred chemical form to work with.

It rapidly oxidizes in air, so that bulk oxidation of a centimeter-sized sample occurs within several days.

The gas oxidizes rapidly in air.

In the presence of oxygen and water, they rapidly oxidize to form free iron ions.

In the earth's atmosphere, methane rapidly oxidizes into water and carbon dioxide.

Agaritine oxidizes rapidly upon storage, however, and is totally degraded after 48 hours in aqueous solution with exposure to air.

In moist air or moist argon, the metal oxidizes rapidly, producing a mixture of oxides and hydrides.

These advantages are especially important for such coating materials as Ti, plastics, and metallic glasses, which rapidly oxidize or deteriorate at high temperatures.

Their preservation is exquisite; fresh leaves are unfossilized, and sometimes retain their fall colors before rapidly oxidizing in air.