Dental amalgam controversy total global emissions. Mercury emissions from cremation are growing in the US, both because cremation rates are increasing and because the number of teeth in the deceased are increasing due to better dental care. Since amalgam restorations are very durable and relatively inexpensive, many of the older deceased have amalgam restorations. According to work done in Great Britain, mercury emissions from cremation are expected to increase until at least 2020. The American Dental Association (ADA) has asserted that dental amalgam is safe and has held that, "the removal of amalgam restorations from the non-allergic patient for the alleged purpose of
Inorganic chemistry based on their properties. Partly the classification focuses on the position in the periodic table of the heaviest element (the element with the highest atomic weight) in the compound, partly by grouping compounds by their structural similarities. When studying inorganic compounds, one often encounters parts of the different classes of inorganic chemistry (an organometallic compound is characterized by its coordination chemistry, and may show interesting solid state properties). Different classifications are: Classical coordination compounds feature metals bound to "lone pairs" of electrons residing on the main group atoms of ligands such as HO, NH, Cl, and CN. In modern coordination