004 3 m‚ expressed correctly using scientific notation‚ is A) 4.3 x 10-7 m. B) 4.3 x 10-6 m. C) 4.3 x 106 m. D) 0.43 x 10-5 m. E) 4.3 m. Answer: B 2) Which of the following measurements has three significant figures? A) 0.005 m B) 510 m C) 0.510 m D) 0.051 m E) 5100 m Answer: C 3) Which of the following numbers contains the designated CORRECT number of significant figures? A)
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|Atoms and Molecules | |Everyday Science | | An atom is the smallest "piece" of an element that still has the properties of that element. A molecule is a combination of two or more | |atoms bonded together.
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THE STRUCTURE OF SILICON DIOXIDE Silicon Dioxide is commonly found in our daily lives- but what exactly is it? Silicon Dioxide (SiO2)‚ or Silica‚ is the most abundant compound of silicon found in the Earth’s crust‚ as well as a widely found oxide. Formed when silicon is exposed to the oxygen in the atmosphere‚ it is a giant covalent molecule with strong electrostatic forces of attraction between the adjacent non-metal oxygen and silicon atoms. Silicon Dioxide occurs in 13 different structural modifications
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processes. As a result of this‚ new areas have evolved such as bioinorganic chemistry and bioorganic chemistry. In this section we will talk about an important concept in bioinorganic chemistry called “Metallobiomolecules”. Metallobiomolecules 2.3. Electron Transfer Proteins 2.3.1. Cytochromes 2.3.2. Iron-Sulphur Proteins 2.4. Zinc Metalloproteins 1.0 Introduction to Metallobiomolecules As we already know‚ biomolecules are molecules appear in biological systems to perform a specific function‚ like
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5.0 Net Neutrality 5.1 What is net neutrality? Net neutrality is the principle that Internet service providers and governments regulating the Internet should treat all data on the Internet the same‚ not discriminating or charging differentially by user‚ content‚ website‚ platform‚ application‚ type of attached equipment‚ or mode of communication. The term was coined by Columbia University media law professor Tim Wu in 2003‚ as an extension of the longstanding concept of a common carrier‚ which
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Electromagnetic Spectrum Project Introduction: In this project you work for a company that produces and sells electromagnetic waves (Waves-R-Us). Your job is to do extensive research on the company’s products and then to design a catalog that will persuade customers to buy our product. You will also need to inform customers of the dangers of our waves. Task: You must design a catalog that will persuade the customers of Waves-R-Us to buy your products. Your catalog must have 1 page for each
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The Periodic Properties of Atoms The Periodic Table: In the 1870’s‚ the Russian chemist Mendeleev developed the periodic table‚ based upon the relationship between the atomic weights of the elements and their chemical properties. As one ascends from lightest to heaviest elements‚ there is a periodic recurrence of chemical properties. For example‚ the elements with atomic numbers 2‚ 10‚ 18‚ 36‚ 54‚ and 86 all are chemically inert (the noble gases)‚ while those with atomic numbers one greater 3‚ 11
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Atoms are a part of our everyday life. Even though people might not realize it‚ they contribute to more things than people may think. From small things such as a small pebble‚ to something huge‚ like a castle. They inhabit our lifes in more way than one. Atoms make up everything around us from the air we breathe to food we eat and even the stars in the sky. The average layman does not know much about the atom but in this paper I will explain what and why they are. The word atom comes from the Greek
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Green Chemistry Institute Atom Economy Page 1 American Chemical Society --------------------------------------------------------------------------------------------------------------------- CLEANING UP WITH ATOM ECONOMY By Kathryn E. Parent‚ k_parent@acs.org Introduction Cleaning up the environment and‚ more importantly‚ preventing pollution are important issues in today’s world. The theme for the 2002 National Chemistry Week is “Chemistry Keeps Us Clean.” While the chemical industry is traditionally
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Silicon Valley - The heartland of the microelectronics industry and a modern civilization community. It plays the most important role in the development such as of Hp‚ Intel‚ Google‚ Apple products and many more. A place where overnight millionaires could be found. Given the status and reputation of this city‚ people expect lives to be easier‚ highly technological and well-advanced. People living here are well equipped to technology and their lives revolve around the modernization of the facilities
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