The atomic structure of an atom that is stable and unreactive would first be that its valence shell is full, it is a happy atom. They do this by losing, gaining or sharing their electrons. This makes them stable. It is also a Noble gas, noble gases are unreactive!
B. there are more organisms than resources.. Overpopulation in a habitat could lead to increased competetion and deaths of animals that do not know how to fight for food.
The chemical breakdown of a computing due to reaction with water