HSC Chemistry Topic 1 PRODUCT ON of MATERIALS What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. POLYMERS FROM PETROCHEMICALS & BIOMASS 2. ALTERNATIVE FUELS - ETHANOL & THE ALKANOLS 3. REDOX CHEMISTRY & BATTERIES 4. RADIOACTIVITY & ITS USES ...all in the context of society’s use of energy and materials but first) an introduction ... In the previous topic in the Preliminary Course‚ you learnt about carbon chemistry of petroleum Then you
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1. Who are the authors? (Where are they doing their research? What kinds of research are they known for? What other things have they done?) Adam Hadhazy is a freelance science writer based in New Jersey. He is known for his research and reports on astronomy‚ biology and psychology; he has written other works such as‚ “Where Does the Period Table End?” which was published in discover magazine and‚ “The Reality of ‘Silicon Valley’” which was published in popular science. (Hadhazy) 2. What is the main
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From 1928 to 1952‚ experiments done by Frederick Griffith‚ Oswald Avery‚ Alfred Hershey‚ and Martha Chase all did experiments that contributed to the discovery of the DNA. Frederick Griffith experiment was done in 1928‚ Oswald Avery’ was done during the early 1940’s‚ and Alfred Hershey’s with help from Martha Chase was done in 1952. All of these experiments contributed to the idea known as translation‚ the process of cell ribosomes converting proteins to messenger RNA‚ or mRNA. Because of how they
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found as a solid and is most commonly found as a byproduct to mining iron and nickel‚ and is only classified as cobalt for about 40 days after being harvested. Even more information about this fascinating element would be that it is an artificial isotope‚ is an important gamma ray source‚ and is extensively used as a tracer and a radio therapeutic agent. Other uses that are more close to home if you will would be that it can be used for high-speed‚ heavy-duty‚ high temperature cutting tools‚ and for
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been proven to have a negative effect on plants and the environment. Ruthenium is the only group eight element not to have two electrons in its outer shell. There are seven natural and stable isotopes of ruthenium‚ in addition to thirty-four radioisotopes. Furthermore‚ the most stable of its radioactive isotopes only has a half-life of 373 days‚ while most of the others
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Chapter 25 Process of fossilization · Moving water can suspend sediment – inorganic particles · Moving water fills into still body of water o Sediment flats to the bottom o Forms a layer o More layers form with different compositions on the bottom of the lake or ocean · Living things in the ocean die and get buried in the sediments in the ocean · A lot of weight and pressure pushing down · The organic material is replaced by rocks – mineralization resulting
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Pillar: The radiation released by nuclear weapons could have resulted in the process of natural selection allowing those who are more resistance to cancer and more adaptive to the radioactive environment to
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endanger human health and the health and welfare of plants and animals‚ or can attack materials‚ reduce visibility‚ or produce undesirable odours. Among air pollutants emitted by natural sources‚ only the radioactive gas radon is recognized as a major health threat. A by-product of the radioactive decay of uranium minerals in certain kinds of rock‚ radon seeps into the basements of homes built on these rocks‚ posing a risk of lung cancer to residents. Effects of Air Pollution Potential pollutants
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It’s a metal‚ and named after the Greek God Prometheus. It is not naturally occurring‚ but can survive outside of a lab. Promethium has an atomic number of 61‚ which is the number of protons. Its atomic mass‚ protons+neutrons‚ is 145u. It is an isotope. This means that it has a different number of neutrons (84) than the number of electrons and protons (61). Every element changes states of matter at different temperatures. Promethium melts at 1042.0°C (1315 Kelvin)‚ boils at 3000.0°C (3273 Kelvin)
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1. Demonstrate an understanding of common electrostatic phenomena in terms of movement of electrons‚ including: b lightning 2. Explain how earthing removes excess charge by movement of Electrons 3. Explain some of the uses of electrostatic charges in everyday situations‚ including paint and insecticide sprayers 4. Describe how an ammeter is placed in series with a component to measure the current‚ in amps‚ in the component 5. Explain how current is conserved at a junction 6. Explain how the
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