detergents kill the good bacteria in the soil. Positive Effects * Upon interaction of plants with low concentration of a detergent‚ several plants show signs of better growth and development. Detergents containing sodium‚ chlorine bleach and boron may have negative effects while potassium‚ ammonia and phosphate show good effects on plant growth. Materials: Detergent Soap Pond Water 2 containers Pea plant Procedure: Because phosphates from household detergents seep into groundwater
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Bare Minerals versus Pur Minerals Kristina McClary English 112 March 4‚ 2010 In the last ten years the cosmetics has transcends from chemical base to natural from foundations and blushes to lip color and eye makeup. Women have many choices in cosmetics brands‚ such as department specialty discount stores brands. Due to the growing popularity of natural cosmetics in demand specialty cosmetic companies like Bare Minerals and Pur minerals were introduce to answer. Bare Minerals the first to
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How did Mendeleev persuade any doubters that his periodic table really was a useful tool in understanding the chemical elements? Mendeleev predicted the discovery of other elements and left space for these new elements‚ namely silicon‚aluminium‚ and boron‚ pointed out that some of the atomic weights being used at the time were incorrect and provided for variance from atomic weight order. (Pg 199) Copy and complete using the words below: Outer‚ Atomic‚ Electrons‚ Shell‚ Group‚ Number
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CHERNOBYL On April 26‚ 1986‚ a hellish white glow bejeweled a small‚ little-known town in central Ukraine‚ now notoriously recognized by the international community as Chernobyl. During the early morning hours of the twenty-sixth‚ operators had been running an ill-conceived experiment on reactor unit number four‚ during which a spike in the operating level of the core caused a catastrophic explosion. The resulting eruption of radionuclides‚ both from the initial explosion and from the subsequent
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one oxidation states in certain types of compounds: a) The elements of Group IA always have an oxidation number of +1 in compounds. b) The elements of Group IIA always have an oxidation number of +2 in compounds. c) Boron and aluminum always possess an oxidation number of +3 in compounds. d) The nonmetallic elements of VIA (O‚ S‚ Se and
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On March 11‚ a 9.0 magnitude earthquake hit Japan and caused tremendous damage to Japan. The earthquake sparked off a 30-foot tsunami within an hour‚ which only compounded the‚ already extensive‚ damage to the country. One of the greatest fears was the potential of a nuclear fall out. Specifically‚ the Fukushima Daiichi power plant was in question. The nuclear plant in Fukushima had six nuclear reactors‚ and three out of six of them were in critical state – possibly melting down. The potential of
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popular used isotopes for scans is Technetium -99m‚ this isotope last only for a period of time. Positron emission tomography (PET) is another technique used. With the radiation therapy this is the method used to treat cancers‚ to apply this treatment a boron-11 isotope solution is placed within the tumor which bombards it with neutrons; particles are only produced at the tumors sight killing the cancerous cells. With using these radioisotopes to play a role as tracers‚ the application method for this
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PRACTICE EXAMINATION QUESTIONS FOR 1.1 ATOMIC STRUCTURE (includes some questions from 1.4 Periodicity) 1. (a) Complete the following table. |Relative mass|Relative charge| Neutron||| Electron||| (2) (b) An atom has twice as many protons as‚ and four more neutrons than‚ an atom of 9Be. Deduce the symbol‚ including the mass number‚ of this atom. ..................................................................................................................................... (2) (Total
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Synopsis of: Elements of Life Your body is made of elements‚ like everything else in the world‚ even the universe. Amazingly about 97% of our bodies are made up of only four elements‚ oxygen‚ carbon‚ hydrogen‚ and nitrogen. The other 3 percent is filled with 20 other elements‚ which are needed to live. Some of those elements are calcium‚ phosphorus‚ potassium‚ sulfur‚ sodium‚ magnesium‚ and many more. In the circulatory system‚ two elements that are critical to the circulatory system are iron
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silver(I) telluride 12002-99-2 Ag3Br2 silver dibromide 11078-32-3 Ag3Br3 silver tribromide 11078-33-4 Ag3Cl3 silver(III) trichloride 12444-96-1 Ag3I3 silver(III) triiodide 37375-12-5 Ag3PO4 silver phosphate 7784-09-0 AlBO aluminium boron oxide 12041-48-4 AlBO2 aluminium borate 61279-70-7 AlBr aluminium monobromide 22359-97-3 AlBr3 aluminium tribromide 7727-15-3
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