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  1. 1. Name Symbol Etymology Atomic Number Standard Atomic Weight Metallic Category Group Period Block Electron Configuration Polonium Po After “Poland” native country of Curie 84 (209) Post Transition Metal 16 6 p [Xe] 6s2 4f14 5d10 6p4
  2. 2.  Polonium is a rare, silvery-gray, radioactive lowmelting metalloid.  Polonium readily reacts with dilute acids, but only slightly with alkalis.  All of its isotopes are radioactive.  210Po emits a blue glow, as the air around it is excited by the decay products. No. of Protons (p+) No. of Electrons (e-) No. of Neutrons (n0) 84 84 125
  3. 3.  Polonium was the first element Marie and Pierre Curie discovered in 1898.  First isolation of Polonium was performed by Willy Marckwald in 1902.
  4. 4. Color Density Melting Point Boiling Point Heat of Fusion Silvery Gray 9.4 g/cm3 527 K, 489 °F 254 °C 1764 °F 962 °C, 1235 K ca. 13 kJ·mol−1 Heat of Vaporization 102.91 kJ·mol−1 Molar Heat Capacity 26.4 J·mol−1·K−1 Vapor Pressure P (Pa) at T (K) 1k (846) 10 k 1003 100 k 1236
  5. 5. Electronegativity 2.0 (Pauling scale) Ionization Energies 1st: 812.1 kJ·mol−1 Atomic Radius 168 pm Covalent Radius 140±4 pm Van der Waals radius 197 pm
  6. 6. Half-Life 102.1 y Lifetime 147.1 y Decay Mode Alpha Emission Quantum Numbers 3P 2 Neutron Cross Section 0.5 Known Isotopes 188Po, 189Po, 190Po, 218Po, 219Po, 220Po …,
  7. 7.  Abundance earth’s crust: Of the order of 1 part per quadrillion.  Abundance solar system: negligible  Source: It is found in uranium ores in minute quantities.  Isotopes: Polonium has 29 isotopes whose half-lives are known, with mass numbers 190 to 218. None are stable. The most stable isotope is 209Po, with a half-life of 102 years.
  8. 8.  Neutron Capture  It can be obtained by bombarding natural bismuth, 209Bi , with neutrons to give 210Bi, which then decays to 210Po via β decay.  The final purification is done pyrochemically followed by liquid-liquid extraction techniques.  Proton Capture  It has been found that the longer-lived isotopes of polonium can be formed by proton bombardment of bismuth using a cyclotron.
  9. 9.  Nuclear batteries  Electrical devices  It is used to eliminate static electricity produced during processes such as rolling paper, wire and sheet metal.  210Po can be used as an atomic heat source.  Polonium is also used in anti-static brushes to eliminate dust on photographic film.
  10. 10.  Polonium is harmful both through its chemical toxicity and its radioactivity.  Polonium-210 is an alpha emitter. As such it is very hazardous if swallowed or inhaled.  Exposure to polonium increases the risk of getting various cancers.  A person poisoned by Polonium.