Families of elements—Nonmetals 1. Chemical properties of the halogen family are that the halogens are located in Group VIIA of the periodic table‚ and are a class of nonmetals. The halogen elements are fluorine‚ chlorine‚ bromine‚ iodine‚ astatine‚ and ununseptium. These nonmetals are reactive and have seven valence electrons. 2. Halogens are located in Group VIIA which means they have seven valance electrons. One short from an octet. 3. Similarities with almost all solutions except for Test tube
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When you mix copper‚ silver‚ and nitrate together‚ you will end up with silver nitrate solution will turn blue (it has become copper nitrate). On the piece of copper‚ there would be a coating of solid silver. If a chemical reaction is going to be observed when chemicals are mixed‚ heated or any other means of altering the substance‚ then we will be able to predict the products formed. If it is observed that in the original versus the changed substance no new substances are formed‚ the change is reversible
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Copper in Silver Nitrate Lab: Making Silver Sabrina Kate S. Carranza – Chemistry Hour 6 I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution
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the water from the barium chloride hydrate has been completely removed. The anhydrous salt is placed in distilled water for filtering and bonding purposes. The 1.0M silver nitrate solution is placed in with the distilled water and anhydrous salt so a chemical reaction can occur. The new solution is heated to be sure that the chemical reaction is complete and all new bonds have been formed. The solution is then filtered through the filter paper to separate the precipitate from the solution itself
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Iodine Isotopes are the atoms that have in their nucleus an atomic number corresponding to the chemical behavior of that element. Since isotopes have the same number of protons‚ they all have identical chemical behavior. But‚ however‚ since their neutron numbers are different the isotopes of the same element may have different radioactivity. An isotope that is radioactive is called a radioisotope like iodine‚ which is important in our health. In radioactivity‚ the nucleus of an unstable isotope
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EXPERIMENT 3-CHEMICAL KINETICS: THE IODINE-CLOCK REACTION J.CHAN1 and C.CABANLIG2 1NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE 2NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: JANUARY 8‚ 2013 DATE PERFORMED: DECEMBER 5‚ 2012 ------------------------------------------------- ABSTRACT The kinetics of the reaction between persulfate (S2O82-)
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21st‚ 2013 MC 205 Week 4 Instructor Rein Chemical Stress Testing A chemical stress test is used when a traditional stress test (called a cardiac stress test) cannot be done. A cardiac stress test requires you to walk on a treadmill or ride a stationary bicycle until your heart rate reaches a level where your heart is “stressed”. You may not be able to participate in this kind of test if you have a condition such as a stroke. In this case‚ a chemical stress test is used. This test is used to help
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CHAPTER 7 THE TWO-VARIABLE REGRESSION MODEL: HYPOTHESIS TESTING QUESTIONS 7.1. (a) In the regression context‚ the method of least squares estimates the regression parameters in such a way that the sum of the squared difference between the actual Y values (i.e.‚ the values of the dependent variable) and the estimated Y values is as small as possible. (b) The estimators of the regression parameters obtained by the method of least squares. (c) An estimator
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SCIENCE REPORT AMMONIUM NITRATE NH4NO3 Problem Our task was to investigate what the optimum ratio of solute to solvent that will produce the maximum cooling/heating effect? Hypothesis With a smaller quantity of water (50mls) and the same amount of Ammonium Nitrate added. After any period of time the mixture will be a cooler temperature than that of a mixture with a larger quantity of water. Variables X Water X Teaspoons X Time X Ammonium Nitrate X Thermometer X Stirring
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Nitrate concentration comparison in the Suwannee River Basin Sara Santarelli Project summary Goals: Project Description A. Since 1971 nitrate concentrations in the Suwannee River have been increasing at a rate of 0.02 mg/L per year. The rise of nitrate concentrations found in the Suwannee River basin must be addressed. This problem is of extreme significance not only to hydrogeologists‚ but also anyone who cares about preserving natural Florida. Attempts to remove nitrate concentrations
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