Cadmium Facts - Periodic Table

Cadmium Facts - Periodic Table Cadmium Atomic Number 48 Cadmium Symbol Compact disc Cadmium Atomic Weight 112.411 Cadmium Discovery Fredrich Stromeyer 1817 (Germany) Electron Configuration [Kr] 4d10 5s2 Word Origin Latin cadmia, Greek kadmeia - antiquated name for calamine, zinc carbonate. Cadmium was first found by Stromeyer as a pollution in zinc carbonate. Properties admium has a liquefying 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 effectively cut with a blade. Employments Cadmium is utilized in compounds with low softening focuses. It is a segment of bearing compounds to given them a low coefficient of grating and protection from exhaustion. Most cadium is utilized for electroplating. It is additionally utilized for some kinds of bind, for NiCd batteries, and to control nuclear splitting responses. Cadmium mixes are utilized for high contrast 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 color. Cadmium and its mixes are poisonous. Sources Cadmium is most normally found in little amounts related with zinc metals (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