Hazards of Electricity 1. Electric Shock 2. Fire / Short Circuit 3. Electric Burns Confidential Slide Electric Shock It is sudden & accidental stimulation of the body’s nervous system by electric current. It is the result of passage of electric current through the human body Confidential Slide • Most widely recognised danger of electricity. • When a person standing on the ground touches a live wire‚ or touches a live tool or machine with poor insulation or hits a live cable‚ then a person
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Identification of Metallic Ions Pre Lab Questions: 4pts 1. What are the learning goals of this experiment? To perform and observe the flame tests of some alkali and alkaline earth metal ion 2. Define ground state and excited state of an atom. Ground state- normal configuration of the electrons about the atom or the ion of an element; stable particle electrons are at lowest possible energy level Excited state- when stable particles are heated to very high temperatures some of the electrons leave
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laboratory analysis of metallic equipment for timely prediction of mercury deposition. Pure mercury during flushing or Mercuric sulfide deposition from environment is possible on metallic surfaces‚ however the mechanisms by which mercury is absorbed by steel are not known conclusively but reaction with grain boundary elements or compounds is the most likely postulate. Simple cleaning and decontamination treatments often suffice for completely retrieve mercury on metallic equipment Removal of mercury
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A process for the preparation of racemic phenylethylamine which comprises contacting an optical antipode therefore‚ e.g.‚ L(-) or D(+)-1-phenylethylamine with sodium amide or sodium hydride. Claim: What is claimed is: 1. A process for preparing racemic 1-phenylethylamine which comprises contacting L(-)-1-phenylethylamine or D(+)-1-phenylethylamine with 0.01 to 1 weight percent‚ based on theamount of said phenylethylamine‚ of sodium amide or sodium hydride at a temperature of 70.degree. to 150
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Chemistry 11 Final Examination Review - Answers Part A - True or False. Indicate whether each of the following statements is true or false. Correct the false statements. F 1. The mass of an electron is equal to the mass of a proton. The mass of an electron is less than the mass of a proton. T 2. The mass of a proton is approximately equal to the mass of a neutron. T 3. The atomic number represents the number of protons in a nucleus. T 4. The proton has a mass of approximately
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on the number of bonding groups (pairs of electrons) and the number of nonbonding electrons on the central atom. The five important electron-pair geometries were: When the central atom has 3 bonding pairs of electron the geometry is trigonal planar. The bond angles are all 120Ü. | | When the central atom has 4 bonding pairs of electron the geometry is tetrahedral. All of the bond angles are 109.5Ü. | | When the central atom has 5 bonding pairs of electrons and no non-bonding pairs the geometry
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Julia Supangan blk. 2-4 The Reaction of Various Metals with Ionic Salts Purpose: To examine the reaction of various metals with ionic salts Materials: * 4 test tubes * test tube racks * 10mL measuring cylinder * 4 metals (in containers)- Zn‚ Sn‚ Mg‚ Fe * copper (II) sulphate solution Safety: 1. Be careful with copper (II) sulphate solution it is poisonous and corrosive. handle with care 2. Do NOT BREATH in any gases produced 3. If you touch any of the
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a subunit. A dimer is known to be the simplest sort of quaternary structure as it contains two identical subunits. Interactions between subunits of a protein containing a quaternary structure are usually weak interactions such as hydrogen bonding‚ ionic bonding‚ and van der Waals. It is important to note that quaternary structures can be simple such as two identical subunits or even complex where dozens of different polypeptide chains come
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4.3 Develop a simulation model for better performance The next part of this proposes improvement of the bonding workstation using simulation methods. Simulation is a kind of analysis method‚ which involves systems‚ models and applications‚ to mimic the behavior of reals systems‚ using appropriate software on a computer. Simulation models can be used to analyze and measure the effect of changes on the manufacturing processes. Other advantages of simulation are that it can be done with less analytic
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Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Small silver‚ metallic‚ shards No smell Shriveled up and turned white. Produced gas insoluble Boiled fast‚ some sample floated to top of H2O‚ and sample jumped around test tube Red= got damp‚ turned dark pink Blue= turned dark blue/purple and light blue/gray where drop hit paper Became very hot‚ bubbled‚ produced gas No reaction‚ not soluble Cu Bronze metallic balls No smell Turned grey and moved around tube insoluble Insoluble
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