Presents nearly one thousand entries and 750 illustrations on science and technology, with bibliographies after each entry and sidebars containing relevant facts.Excess nitrogen also makes its way into aquatic ecosystems, upsetting their equilibrium. ... Although that is not a practical problem for the foreseeable future, it does represent a distortion of the phosphorus cycle. ... All of these elements have five electrons in their outermost (valence) energy level, which affects the types of bonds they ... A full valence shell means the atom is in its most stable energy state.
|Title||:||Encyclopedia of Science and Technology|
|Author||:||James S. Trefil|
|Publisher||:||Taylor & Francis - 2001-01|