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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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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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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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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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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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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every step of the open-pit mining process. Hardrock mining exposes rock that has lain unexposed for geological eras. When crushed‚ these rocks expose radioactive elements‚ asbestos-like minerals‚ and metallic dust. During separation‚ residual rock slurries‚ which are mixtures of pulverized rock and liquid‚ are produced as tailings‚ toxic and radioactive elements from these liquids can leak into bedrock if not properly contained. Underground Mining Underground mining has the potential for tunnel collapses
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Thorium‚ as well as uranium and plutonium‚ can be used as fuel in a nuclear reactor. Here’s how it works. When Th232 absorbs a neutron it becomes Th233‚ which is unstable and decays into protactinium-233 and then into U233. That’s the same uranium isotope we use in reactors now as a nuclear fuel‚ the one that is fissile all on its own. Thankfully‚ it is also relatively long lived‚ which means at this point in the cycle the irradiated fuel can be unloaded from the reactor and the U233 separated from
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U216 Environment: change‚ contest and response TMA U216 06 Question 1 Our responses to environments will not be effective until they take into account the complexities of the responses of environments. Environmental systems can be complicated. When responding to an environment we need to carefully assess how that particular environment might react. What might seem like a straightforward answer to a particular environmental problem can lead to unforeseen complications. This essay seeks
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activity. This idea was supported by the photatic behaviour of the organisms‚ and also by later experiments that showed that no development takes place without the presence of light. Melvin Calvin‚ James Bassham‚ and Andrew Benson studied the radioactive isotope carbon-14 and resulted in the discovery of the
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