Definition of eject. 1  transitive verb. 2  1a : to throw out especially by physical force, authority, or influence ejected the player from the gameb : to evict from property. 3  2 : to throw out or off from within ejects the empty cartridges.
Aluminum is reactive and will react spontaneously with water and/or air to form aluminum oxide. Aluminum oxide, Al2O3, forms a stable passive layer that protects aluminum from corrosion or further oxidation. This layer is about 4 nm thick and will provide corrosion protection as long as this oxide layer is stable.
Reactivity: Metals are very reactive, some more than others, but most form compounds with other elements quite easily. Sodium (Na) and potassium (K) are some of the most reactive metals. A metal like iron (Fe) forms iron oxide (Fe2O3), which you know as rust. 3. Chemical: It gets a little complex here.