Why are we concerned about whether atoms are reactive or not? 5. What determines whether a particular element (type of atom) is reactive? 6. Understand the difference between inert elements and those that are reactive and capable of forming chemical bonds. What is the significance of the valance shell of electrons? 7. Why do atoms seek to form bonds with other atoms? How does this correlate with their stability? 8. Understand the nature of ions and ionic bonds. Why is sodium able to
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Pure chemical substances are classified as ionic, metallic, covalent molecular and covalent network. In this essay I will describe the nature of each bonding present in these different types of substances and use this to explain the physical properties they exhibit and their structures. Ionic compounds are compounds that are composed of positive and negative ions. An ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually, the positively
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Abstract: Introduction: Materials: 12 x 5 cm3 plastic tubes 2 x 5 cm3 graduated pipette 1 x 20 cm3 of stock NADH (80 g cm-3) 1 x 20 cm3 of 50 mM phosphate buffer pH 7.2 2 x semi micro cuvettes Distilled water wash bottle Access to a Whirly mixer Access to Novaspec digital spectrophotometer 1 x 5 cm3 of a solution of NADH of unknown concentration. Method: 1. Using the protocol depicted in Table 1 set up 6 standard concentrations of NADH in buffer ranging from 0 to 80
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Chapter 2 “The Chemistry of Life” Worksheet ANSWERS Section Review 2-1 1. Protons; neutrons 2. electrons 3. neutrons 4. electrons 5. ionic 6. The two main types of chemical bonds are ionic and covalent bonds 7. At atom becomes an ion when it gains or loses electrons 8. Electrons and protons are both subatomic particles; however, they have different charges and locations within the atom. 9. When atoms are joined together by covalent bonds, the structure that
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Specialty Chemicals Defined: Specialty chemicals are a category of relatively high valued, rapidly growing chemicals with diverse end product markets. Typical growth rates are one to three times GDP with prices over a dollar per pound. They are generally characterized by their innovative aspects. Products are sold for what they can do rather than for what chemicals they contain. Products include electronic chemicals, industrial gases, adhesives and sealants as well as coatings, industrial and
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SCH 4U Exam Review Unit 1 - Electrochemistry 1. If Ag+ (aq) + e- Ag (s) was chosen as the standard for half-cell potentials, what would be the half-cell potential for Ni2+ (aq) + 2e- Ni (s)? 2. 3Ca (s) + 2Al(NO3)3 (aq) 3Ca(NO3)2 (aq) + 2Al (s) a) Predict the voltage for an electrochemical cell based on the above reaction. Assume standard conditions. 3. Use the Eo values to determine if the following reaction is spontaneous or not: Mg2+ (aq) + Cu (s) Mg (s)
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Elijah Kim Mrs. Dobler Course 2 2/10/15 Titration lab Titration is used to find the specific amount of a standard solution in an amount of unknown liquid. Titration in this lab is performed with the chemical reactions between acids and liquids. During titration, we have to stop at the point where stoichiometric amounts of acids and bases are reacting. We can find that point by looking for indicators, for example in this lab the indicators were changes in color. So the purpose of all this is
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perfect than gold, it was reasonable to believe that nature created gold out of other metals found deep within the earth and that a skilled artisan could duplicate this process. It was said that once someone was able to change, or transmute a "base" chemical into the perfect metal, gold, they would have achieved eternal life and salvation. In this way, alchemy turned into not only a scientific quest, but a spiritual quest as well. Although the purposes and techniques were often times ritualistic and
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Blood agents are poisons that act on the body by being consumed into the blood (http://emergency.cdc.gov/agent/blood/). There are three known blood agents as identified by the Center for Disease Control: Arsine (SA), Carbon Monoxide (CO), Cyanide, and Sodium monofluoroacetate (compound 1080). I will attempt to discuss in detail how each blood agent enters the body and effects the human body. Blood agents extract from its effect on exposed victims. Blood agents generally enters the body by
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