Metallic chemical element chemically active, soft white color, symbol Cs, is located in the first group of the periodic table which means that he belongs to a group of alkaline elements. Atomic number 55 and atomic weight 132.905, the melting point of 28.4 degrees Celsius and a boiling point of 671 degrees Celsius and density of 1.87 g / cm 3. Cesium was discovered in 1860 by the German chemist Robert Bunsen, German physicist Gustav Kirchoff during the use of the spectroscope when they analyzed the spectrum of mineral water. Characterized by the metal in the spectrum containing two bright lines in the blue along with several others in red, yellow, and green. Because of its ability to release electrons when exposed to light, it enters into
[powerpoint]. As tritium is a radioactive particle, it breaks down over time and releases emissions as it does so. Tritium is a relatively weak radioactive particle and as it breaks down to helium, it releases weak beta emissions. [http://hps.org/documents/tritium_fact_sheet.pdf]. 2.
Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach. It is present in significant quantities in the ore minerals monazite and bastnäsite. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use.
Detection methods of that day mainly relied on the electrical charges of particles revealing their presence—but neutrons, having no electrical charge, would leave no trace. In 1930, the physicists Walther Bothe and Herbert Becker bombarded beryllium with alpha particles (helium nuclei) emitted from the radioactive element polonium, and they found that the beryllium gave off an unusual, electrically neutral radiation. They interpreted this radiation to be high-energy gamma rays
1. For the demo experiment, the balanced chemical equation is as follows: (NH4)2Cr2O7(s)=Cr2O3(s)+N2(g)+4H2O(g). After the lightning of Ammonium dichromate, Chromium (III) oxide was formed while the Nitrogen and Water escaped into the atmosphere in a gaseous phase. Ammonium dichromate((NH4)2Cr2O7) gave rise to Chromium (III) oxide (Cr2O3), Nitrogen Gas(N2) and water (H2O) In terms of microscopic level, the ratio between reactants and products is as follows. One mole of Ammonium dichromate will give rise to one mole of 1 mole of Chromium (III) oxide and 1 mole of Nitrogen gas and 4 moles of Water is gaseous phase.
2.0 LITERATURE REVIEW 2.1 History background and action level Radon is a gaseous highly radioactive element discovered by English physicist Ernest Rutherford in 1899. The discovery is also credited to German physicist Friedrich Ernst Dorn in 1900. More specifically, Rutherford discovered radon's alpha radiation and Dorn discovered that radium was releasing a gas. Radon (chemical symbol Rn) is a naturally occurring radioactive gas found in soils, rock, and water throughout the U.S. It has numerous different isotopes, but radon-220, and radon-222 are the most common (EPA, 2009).
Calcium's melting point is 842°C, 1548°F, 1115 K and boiling point is 1484°C, 2703°F, 1757 K. Calcium is a silver-white soft metal, that reacts to halogens, water, and acid. This metal was first discovered by a man called Humphry Davy, in 1808 through the process of electrolysis while doing a mixture of lime (CaO) and mercuric oxide (HgO). Calcium is one of the most abundant elements on earth, forming over 3% of the earth's crust. It has 6 stable and several radioactive isotopes Calcium is the third most abundant metal in the earth’s crust, but
My super name is Polo Heat Man, but my real name is Polonium. My main power is being an atomic heat source, that is why I have all kinds of flames around me. My weakness is anything over 254 degrees celsius because that will melt me. I was born in 1898 so I am pretty old, roughly 117 years old. My parents are Pierre Currie and Marie Currie.
The resulting molten material is called the blister and contains about 99% copper by mass. (Cavette, 2007) Refining The copper blister is 99% copper but it still have a higher level of sulfure, oxygen some other impurities and by the reason it has to be further refined in order to purifies the cupper, this done by fist firing refined before it is sent to the final electro fining process • The blister copper is heated in in the refining furnace that is similar to the converter ,air is blown into the molten blister to oxides the impurities and a sodium carbonate is added to remove traces of arsenic and the antimony, • The blister copper is heated in a refining furnace, which is similar to a converter described above. Air is blown into the molten blister to oxidize some impurities. A sodium carbonate flux may be added to remove traces • Then the purified copper in then poured into the molds to form large electric
Bituminous coal is formed when a sub bituminous coal is imperiled to increased levels of organic metamorphism. It has a carbon content of between 77% and 87% on a dry ash free basis and a heating value that is much higher than lignite or sub bituminous coal. On the basis of volatile content, bituminous coals are subdivided into low volatile bituminous, medium volatile bituminous, and high volatile bituminous. Bituminous coal is often mentioned to as "soft coal"; however, this designation is a layman's term and has little to do with the hardness of the rock. Anthracite Anthracite is the highest rank of coal.