Chapters 11 12 Periodic Table Name __________________ ( ) Class __________ Date _________ History of the Periodic Table Russian chemist Dmitri Ivanovich Mendeleev 1834-1907 Arranged elements in order of increasing atomic masses Elements with similar chemical properties fall into the same vertical column Such an arrangement is the Periodic Table The Periodic Table The Periodic Table is a list of elements arranged in order of ______________ _____________ (__________) ____________. Groups
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atoms. 3. What is a chemical bond? Discuss the differences between an ionic bond and a covalent bond. Any of several forces‚ especially the ionic bond‚ covalent bond‚ and metallic bond‚ by which atoms or ions are bound in a molecule or crystal. Ionic bonds are chemical bonds between two ions with opposite charges‚ characteristic of salts. Covalent bonds are chemical bond formed by the sharing of one or more electrons‚ especially pairs of electrons‚ between atoms. 4. What are valence electrons
Free Atom Electron Covalent bond
Gold is gold when it is heated. Gold is gold when it turns liquid. And gold is a single solid element. The ionic bonds have an attraction between opposite charged ions by one atom‚ a metal makes a contribution of an electron and becomes a optimistic ion‚ and when another‚ a nonmetal received an electron and becomes pessimistic ion. Metal donate electrons and non-metals receives electrons. For example is Na is positive and CL is negative. The covalent bonds share the electrons and they are normally
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CHM 096 TUTORIAL 6 Mar 2013 (ELECTROCHEMISTRY) 1. Determine the oxidation number of the first name element in the following ions. a) Cr2O72 d) AsO33 b) SbF6 e) BaH2 c) MoO42 f) ClO4− 2. Determine whether each of the reactants shown in the following half-reactions is being oxidized or reduced. a) As4+ As3+ b) Cl2O7 HClO4 c) C2H4O C2H6O d) SO2 SO42− e) Cr2O72− Cr3+ 3. Indicate whether each of the following is or
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through the gel solution on the production of Liesegang rings. Main findings • The lead nitrate/potassium iodide and cobalt chloride/ammonium hydroxide reactions both formed bifurcations. The cobalt chloride/ammonium hydroxide reaction was then investigated under different conditions until discernable Liesegang rings had formed. • It was found that the rate of diffusion of ions was increased when a D.C. current was passed through the gel‚ however the placement of the positive electrode had
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Name : Rebecce C. Deocampo Date : September 2‚ 2013 Course/Yr. : BS Chemistry III Sched : MF 7-10‚ Group#2 Experiment No. 1 Synthesis and Reactivity of Tert-Butyl Chloride I. Objectives : 1. To produce tert-butyl chloride from tert-butyl alcohol 2. To understand the SN1 and SN2 mechanism involved in the reaction 3. To determine the yield of percentage of t-butyl chloride II. Introduction An alkyl halide is a derivative of alkanes. Alkanes are hydrocarbons with a
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Sodium chloride‚ also known as salt‚ common salt‚ table salt‚ or halite‚ is an ionic compound with the formula NaCl. Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. As the major ingredient in edible salt‚ it is commonly used as a condiment and food preservative. [edit] Properties Thermal conductivity of pure NaCl as a function of temperature has a maximum of 2.03 W/(cm K) at 8 K and decreases to 0.069 at 314
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containing silver ions is placed on a piece of copper metal? What will happen if a drop of solution containing copper ions is placed on a piece of silver metal? Chlorine and bromine are both non-metals (both negative in compounds) and both are used for disinfecting and bleaching. What will happen if chlorine is added to a solution containing bromide ions? What will happen if bromine is added to a solution containing chloride ions? Permanganate ions (MnO4-) react with iron(II) ions (Fe2+) in acid
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1. Disposing of Waste - Teachers should be aware of the appropriate method of disposal for any chemical used in the school laboratory. When in doubt‚ refer to the MSDS‚ a disposal manual‚ or the source of the chemical. a. Classification of Hazardous Waste The Environmental Protection Agency classifies wastes as: Ignitable: has a flash point below 140°C‚ is an oxidizer‚ or is an ignitable compressed gas. Corrosive: has a pH equal to or below 2.0 or a pH equal to or greater than 12.5. Reactive:
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While it is easy to make comparisons between the pupil of the eye and the f-stop of a camera or between the retina of the eye and photographic film‚ once we get past the basic similarities of the optics of the two systems‚ comparisons begin to rapidly break down. The eye is not only much more complex than a camera and its film‚ but the two imaging devices function by different chemical mechanisms. The photographer (or the automatic exposure system of the camera) regulates the f-stop opening and time
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