Marie Curie How were the elements of the periodic table discovered? Who discovered them? These are questions that some people may ask. Marie Curie and her husband‚ Pierre Curie‚ were two scientists that discovered two elements of the periodic table‚ polonium and radium. She and her husband worked all of their lives to understand radium and radioactivity. When something is radioactive‚ it produces radiation‚ which is moving subatomic particles.The interesting thing is‚ that radium‚ what Marie Curie discovered
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die each year from smoking. As college students‚ some of us smoke and some of us have differently thinking about smoking. Do you know the content of a cigarette? Over 4‚000 chemicals can be found in tobacco smoke includedradioactive materials (polonium-201) ‚materials used in paints (acetone)‚floor cleaner (ammonia)‚ mothball (naphthalene)‚ pesticides ‚ termite poison (arsenic)‚ toxic gases (hydrogen cyanide) used in the "gas chamber death" of offenders under sentence of death‚ and more. Today
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Wilhelm Röntgen‚ a mechanical engineer and physicist in Germany on November 8‚ 1895 was working in a lab when he had saw some strange fluorescence coming from a table. On the table he found a tube covered in opaque black paper which he was using to study rays. He had concluded that the fluorescence that had gone through the opaque paper was caused by rays. Henri Becquerel used Roentgen’s discovery of rays through the fluorescence some materials produce. Becquerel did a experiment surrounding several
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Cancer has had an increasing impact in our world and the lives of others. The factors of this disease are all around us. Cancer can be caused by dangerous environmental substances called carcinogens‚ which are substances that are known to cause cancer. Overall‚ this disease is caused by changes in genes and it alters the way our cells function. Exposure to particular environmental substances can cause damage to your DNA. Some of these exposures are things such as chemicals‚ tobacco smoke‚ or even
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deaths in America by so much. According to the National Cancer Institute “Smokeless tobacco contains 28 cancer-causing agents‚ including formaldehyde (the same chemical used in embalming)‚ butanol (an industrial solvent and alternative fuel)‚ and polonium-210 and uranium-235 (both used in nuclear weapons).” These people believe that chewing tobacco is a safer alternative‚ but they are being
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Gr7 Science: Applications of the Atom Can The Demonstrated Vast Destructive Power of Nuclear Bombs Continue To Act As A Deterrent To World War III? In early August 1945 an American B-‐29 bomber‚ along with two other planes‚ dropped Little Boy onto the Japanese City of Hiroshima. Then
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INDOOR AIR QUALITY (PUBLIC AWARENESS) Indoor air is often considered safe and free from pollutants. But most people have the greatest contact with toxic pollutants not outside but inside their homes and offices. The modern consumer products like air fresheners‚ cleaning compounds‚ moth repellants‚ cigarettes‚ toilet disinfectants or deodorizers are the most common sources that laden the indoor air with toxic pollutants without anyone even suspecting them or their potential. Indoor air pollution
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Chemical Prperties of Metals Most metals are chemically reactive‚ reacting with oxygen in the air to form oxides over changing timescales (for example iron rusts over years and potassium burns in seconds). The alkali metals react quickest followed by the alkaline earth metals‚ found in the leftmost two groups of the periodic table. Examples: 4Na + O2 → 2Na2O (sodium oxide) 2Ca + O2 → 2CaO (calcium oxide) 4Al + 3O2 → 2Al2O3 (aluminium oxide) The transition metals take much longer to
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Section 2: Marie Curie’s Career Ann Welling Throughout her career‚ Marie Curie was productive in the field of science‚ where she contributed to the field greatly. First‚ she contributed by discovering two new elements‚ she used her early contributions and applied to them for modern-day use‚ and also helped research at the Sorbonne. After she graduated from the Sorbonne‚ Marie Curie looked for work. She was eager to become a scientist and tried to find employment everywhere. First‚ Marie Curie
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specimens Methoprene: Insecticide Megastigmatrienone: Chemical naturally found in grapefruit juice Maltitol: Sweetener for diabetics Napthalene: Ingredient in mothballs Methyl isocyanate: Its accidental release killed 2000 people in Bhopal‚ India in 1984 Polonium: Cancer-causing radioactive element. All of these chemicals have taken a toll on current smokers‚ ex-smokers‚ and people exposed to second hand smoke. Of current smokers in the U.S.‚ 384‚000 have had a stroke from smoking‚ 46‚000 have lung cancer
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