number - from hydrogen (1) to whatever is the highest one currently known (>105). It is arranged so that similiar members fall in a list such as Chlorine Bromine etc.. The average atomic weight is usually shown with each element‚ but due to isotopes (caused buy nuclear varations) the weight is the normal average atomic weight. The table illustrates the similiarity of various elements such as metals‚ noble gases‚ rare earths‚ halides‚ etc. in that they fall into series within the table. The
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favors species that existed for a long time‚ were abundant and wide spread in certain kinds of environment and had hard shells. 2. Radiometric dating can be used to determine the absolute age of rocks strata because a radioactive parent isotope decays to a daughter isotope at a constant rate. The rate of decay is measured in half life. Measurement of magnetism
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-270.98°C becomes a superfluid. Helium becomes solid at -272.2°C at pressures above 26 atmospheres‚ helium boils at -268.9°C and has a density of 0.1664 g/litre at 20°C and one atmosphere. The stable isotopes of helium are a rare form of helium-3 and the most common form of helium-4. Isotopes from helium-5 to helium-10 are unstable and rapidly decay‚ these are only known from certain nuclear reactions and experiments with particle accelerators. Because helium’s’ electron shell is always full
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The world trembled when America dropped the atom bombs on Hiroshima and Nagasaki. The world trembled once again years later‚ but this time to the heavy steps of Godzilla. Along with him came his highly radioactive body leaving trails of radioactive residue. His main abilities were his plasma breath ray‚ immunity to normal weapons‚ giant strength‚ and he can reproduce a-sexually. He was created for a horror movie that showed the effect of what worried the Japanese at the time- Nuclear weapons. In
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is it called nuclear medicine? This field of specialization includes the use of radioisotopes (radioactive material). Hence a combination of drugs and radioisotopes is used in the same. They help in studying the different internal parts of the body. Depending on the part of the body that is to be diagnosed or treated the dose and location is decided. How does it work? A small amount of the radio isotopes is introduced in the body of
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The Fukushima Nuclear Disaster A First-Hand Account of Japan’s Nuclear Crisis Katsumi Furitsu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Young doctors speak out on the Fukushima disaster . . . . . . . . . . .40 Japan’s Nuclear Nightmare Ronald McCoy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 “A terribly difficult situation with a lot of uncertainties”: PSR Press Conference . . . . . . . . . . . . .
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Chapter 1: Biology- The study of life A Hierarchy of Organization 1. Molecules 2. Organelle 3. Cell 4. Tissue 5. Organ 6. Organism Emergent Properties- Novel properties that emerge as each step up the hierarchy of biological order is taken. Reductionism- Reducing complex systems to simpler components that are more manageable to study. Cells- The lowest level of structure capable of performing all the activities of life‚ all organisms are composed of cells which are the basic units of structure
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CHEMISTRY FOR HUMAN WELFARE: IT’S PROMISES AND CONCERNS 2011 had been officially declared “The International Year of Chemistry” t o commemorate the achievements of chemistry and its contributions to mankind. It is so fitting that 2011 is the centenary year for the award of Nobel Prize to Marie Curie for her discovery of Radium and Polonium. Also this is the 150th birth anniversary of Dr. P .C Roy. All living things in this beautiful world are nothing but
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bus 9.2 – Production of Materials: Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: • Basic reactions to remember: – Acid reactions: ▪ acid + base [pic] salt + water HCl(aq) + NaOH(aq) [pic]NaCl(s) + H2O(l) ▪ acid + metal [pic] salt + hydrogen gas HCl(aq) + Mg(s)[pic]MgCl2(s) + H2 (g) ▪ acid + carbonate [pic] salt + carbon dioxide gas + water HCl(aq) + CaCO3(s)[pic] CaCl(s) + CO2(g) + H2O
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preventing the release of radioactive materials through contaminated water and air.7 The Japanese nuclear safety commission estimated that the plant’s reactors "released up to 10‚000 terabecquerels of radioactive iodine-131 per hour into the air for several hours after they were damaged."4 Unlike Chernobyl‚ no immediate deaths or radiation sicknesses have been reported from the accident‚ but the government is still hesitant to allow evacuees to return to the contaminated
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