Barium Facts - Periodic Table of the Elements

Barium Facts - Periodic Table of the Elements Nuclear Number 56 Image Ba Nuclear Weight 137.327 Revelation Sir Humphrey Davy 1808 (England) Electron Configuration [Xe] 6s2 Word Origin Greek barys, overwhelming or thick Isotopes Common barium is a blend of seven stable isotopes. Thirteen radioactive isotopes are known to exist. Properties Barium has a dissolving purpose of 725Â °C, a breaking point of 1640Â °C, and a particular gravity of 3.5 (20Â °C), with a valence of 2. Barium is a delicate metallic component. In its unadulterated structure, it is brilliant white. The metal oxidizes promptly and ought to be put away under oil or other sans oxygen fluids. Barium breaks down in water or liquor. Polluted barium sulfide phosphoresces following presentation to light. All barium aggravates that are solvent in water or corrosive are toxic. Employments Barium is utilized as a getter in vacuum tubes. Its mixes are utilized in shades, paints, glassmaking, as weighting mixes, in the assembling of elastic, in rodent poison, and in fireworks. Sources Barium is just discovered joined with different components, fundamentally in barite or substantial fight (sulfate) and witherite (carbonate). The component is set up by the electrolysis of its chloride. Component Classification Soluble earth Metal Thickness (g/cc) 3.5 Liquefying Point (K) 1002 Breaking point (K) 1910 Appearance delicate, marginally moldable, silver-white metal Nuclear Radius (pm) 222 Nuclear Volume (cc/mol) 39.0 Covalent Radius (pm) 198 Ionic Radius 134 (2e) Explicit Heat (20Â °C J/g mol) 0.192 Combination Heat (kJ/mol) 7.66 Vanishing Heat (kJ/mol) 142.0 Pauling Negativity Number 0.89 First Ionizing Energy (kJ/mol) 502.5 Oxidation States 2 Cross section Structure Body-Centered Cubic Cross section Constant (Ã… ) 5.020 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (eighteenth Ed.)