CHAPTER # 1 Q.DEFINE CHEMISTRY. A. Chemistry‚ a branch of physical science‚ is the study of the composition‚ properties and behavior of matter. Chemistry is concerned with atoms and their interactions with other atoms‚ and particularly with the properties of chemical bonds. Chemistry is also concerned with the interactions between atoms and various forms of energy Q.DEFINE THE BRANCHES OF CHEMISTRY. * Physical chemistry is the study of macroscopic‚ atomic‚ subatomic‚ and particulate phenomena
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INTRODUCTION Radiation‚ flow of atomic and subatomic particles and of waves‚ such as those that characterize heat rays‚ light rays‚ and X rays. All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources. This article delineates the properties and behaviour of radiation and the matter with which it interacts and describes how energy is transferred from radiation to its surroundings. Considerable attention is devoted to the consequences of such an energy
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be split across a page break‚ so be sure that you have seen the entire question and all the answers before choosing an answer. 1. The two most well-known alkaline earth metals are A. calcium and magnesium. B. magnesium and barium. C. strontium and radium. D. calcium and barium. 2. Refer to the periodic table of elements (Figure 30 in your study unit) to help you answer
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waves. Pierre Curie later proved that these waves could damage flesh‚ but could also be a way to treat cancer and other ailments. Marie‚ as well as her husband‚ went on to discover two new elements recently unknown to man‚ those being polonium and radium. Marie became the first woman to win a Nobel Prize for her scientific achievements‚ but the awards did not stop there. She later became the first person ever to win a second Nobel Prize. Although Marie Curie’s life was brought to an end by overexposure
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the Drug "In Europe‚ a woman was near death from a special kind of cancer. There was one drug that the doctors thought might save her. It was a form of radium that a druggist in the same town had recently discovered. The drug was expensive to make‚ but the druggist was charging ten times what the drug cost him to make. He paid $200 for the radium and charged $2‚000 for a small dose of the drug. The sick woman’s husband‚ Heinz‚ went to everyone he knew to borrow the money‚ but he could only get together
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Pros and Cons of Nuclear Power What’s nuclear power’s biggest advantage? It doesn’t depend on fossil fuels and isn’t affected by fluctuating oil and gas prices. Coal and natural gas power plants emit carbon dioxide into the atmosphere‚ which contributes to climate change. With nuclear power plants‚ CO2 emissions are minimal. According to the Nuclear Energy Institute‚ the power produced by the world’s nuclear plants would normally produce 2 billion metric tons of CO2 per year if they depended on
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Identify the past participle of the verb: Know D) Known | | 7.- Change to negative form: The Eiffel Tower was completed in 1889. A) The Eiffel Tower wasn’t completed in 1889 | | 8.- Choose the negative form: The radium was discovered by Marie Curie. A) The radium wasn’t discovered by Marie Curie. | | 9.- Choose the negative sentence: America was discovered in 1492. C) America wasn’t discovered in 1492. | | 10.- Identify the past participle of the verb: CLEAN B) Cleaned
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Inert Gases Inert Gases and Characteristics • The inert gases are obtained by fractional distillation of air. • They are often used aboard chemical tankers and product carriers (smaller vessels). • Helium‚ Neon‚ Argon‚ Krypton‚ Xenon‚ Radon and are inert gases. • Duplet (Helium) or Octet • Full valence shell • • • • Weak interatomic force Very low melting and boiling points. Monatomic gases under standard conditions Helium has several unique qualities when compared with
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Journal of Human and Ecological Risk Assessment: The wastewater from fracking contain chemicals that are potentially toxic and natural contaminants from underground‚ such as barium‚ strontium‚ benzene‚ toluene and radioactive materials (NORM) such as Radium (Colborn‚ Theo et al‚ 2011). An EPA study in 2004 concluded fracking does not pose a risk to drinking water‚ but the study was later criticized Because the suspect intervention of industrial oil / gas. In 2009 ProPublica investigation found that water
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Section 1: What is radioactivity? Nuclear Radiation During radioactive decay‚ the unstable nuclei of these isotopes emit particles‚ or release energy‚ to become stable isotopes‚ as Figure 1 shows. After radioactive decay‚ the element changes into a different isotope of the same element or into an entirely different element. Recall that isotopes of an element are atoms that have the same number of protons but different numbers of neutrons in their nuclei. Different elements are distinguished
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