Cadmium Facts - Periodic Table

Cadmium Facts - Periodic Table Cadmium Atomic Number 48 Cadmium Symbol Album Cadmium Atomic Weight 112.411 Cadmium Discovery Fredrich Stromeyer 1817 (Germany) Electron Configuration [Kr] 4d10 5s2 Word Origin Latin cadmia, Greek kadmeia - old name for calamine, zinc carbonate. Cadmium was first found by Stromeyer as a polluting influence in zinc carbonate. Properties admium has a dissolving purpose of 320.9Â °C, breaking point of 765Â °C, spcific gravity of 8.65 (20Â °C), and a valence of 2. Cadmium is a blue-white metal delicate enough to be effortlessly cut with a blade. Employments Cadmium is utilized in combinations with low softening focuses. It is a part of bearing combinations to given them a low coefficient of grinding and protection from weakness. Most cadium is utilized for electroplating. It is additionally utilized for some sorts of patch, for NiCd batteries, and to control nuclear parting responses. Cadmium mixes are utilized for highly contrasting TV phosphors and in the green and blue phosphors for shading TV tubes. Cadmium salts have wide application. Cadmium sulfide is utilized as a yellow shade. Cadmium and its mixes are poisonous. Sources Cadmium is most ordinarily found in little amounts related with zinc minerals (e.g., sphalerite ZnS). The mineral greenockite (CdS) is another wellspring of cadmium. Cadmium is acquired as a side-effect during treatment of zinc, lead, and copper metals. Component Classification Change Metal Thickness (g/cc) 8.65 Liquefying Point (K) 594.1 Breaking point (K) 1038 Appearance delicate, pliant, blue-white metal Nuclear Radius (pm) 154 Nuclear Volume (cc/mol) 13.1 Covalent Radius (pm) 148 Ionic Radius 97 (2e) Explicit Heat (20Â °C J/g mol) 0.232 Combination Heat (kJ/mol) 6.11 Dissipation Heat (kJ/mol) 59.1 Debye Temperature (K) 120.00 Pauling Negativity Number 1.69 First Ionizing Energy (kJ/mol) 867.2 Oxidation States 2 Cross section Structure Hexagonal Cross section Constant (Ã… ) 2.980 Cross section C/A Ratio 1.886 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (eighteenth Ed.) Come back to the Periodic Table Science Encyclopedia