is an example of a binary compound. Several other examples are listed below. Potassium bromide KBr Calcium bromide CaBr2 Lithium fluoride LiF Lithium oxide Li2O When naming binary compounds follow these rules: 1. the element with the positive ionic charge is written first. 2. The second word is formed by changing the ending of the name of the element to “ide.” For example‚ bromine changes to bromide. Metals usually have positive charges while nonmetals (when combined with nonmetals) have
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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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safety materials required are safety goggles and apron. Also its suggested to wash hands after dealing with any of the chemicals. some chemicals with safety hazards we will be working with are Sodium chloride with is slightly toxic if ingested. Sodium Bromide which is slightly toxic if inhaled or ingested may cause serious eye damage if in contact. Sodium Iodide may cause serious eye damage‚ corrosion or irritation causes skin irritation. Silver Nitrate may cause skin corrosion or irritation also may cause
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FORM 4G ELECTROLYSIS WORKSHEET TERM 3 2010-2011 1.Figure 1 below is a diagram of the apparatus used in the electrolysis of fused sodium bromide. Figure 1 a)Write the formulae for the ions present in the fused sodium bromide. b)Write an ionic equation to represent the reaction taking place at the positive and negative electrodes. c)When the heat source was removed‚ the crucible cooled and the lamp went out. Explain why the lamp went out when the crucible cooled. d)At the end of the experiment
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mmol) and sodium bromide (1.8 g). Place the reaction flask in an ice bath (at least 5oC) for 5 minutes (keep this reaction in the hood). Add sodium hypochlorite (8.3 mmol) by addition of household bleach; leave the reaction flask in the ice bath 5 min. After removing the flask from the ice bath and placing a watch glass over the opening‚ allow the reaction mixture to come to room temperature over 15 minutes. Place the reaction flask into the ice bath and quench the unreacted bromine by addition of
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[pic] Contents |PART I PLANET EARTH | |Chapter 1 Fundamentals of chemistry | | |The scientific method |1 | |Kinetic theory of matter
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Mutagens may be of physical‚ chemical or biological origin. They may act directly on the DNA‚ causing direct damage to the DNA‚ and most often result in replication error. Some however may act on the replication mechanism and chromosomal partition. Many mutagens are not mutagenic by themselves‚ but can form mutagenic metabolites through cellular processes. Such mutagens are called promutagens. [edit]Physical mutagens Ionizing radiations such as X-rays‚ gamma rays and alpha particles may cause DNA
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I https://www.oppapers.com/join.php#submit . Experiments with Metals and Ions of Metals Introduction Metals are similar in their physical properties in general‚ but they are not identical. Most of the metals are solids; few of them are liquids‚ such as mercury and cesium. Density of metals is not similar also. For example‚ sodium has density of 0.97g/cm3 while lead has density of 11.4g/cm3. Melting point of sodium is 98.0oC while for lead it is 327.6oC. Metals have the capability
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Y and Z have same no. of e－ in outermost shell) 1 1994 - 7(b) Marking Scheme (i) Bromine exists as simple molecules with weak intermolecular attraction/ weak van der Waal’s force. ∴ it has low b.p. (Do not accept bromine has weak covalent bond.) In Lead(II) bromide‚ the attraction between ions is strong/ ionic bond/PbBr2 has strong electrostatic attraction. ∴ it has higher a m.p. (Do NOT accept lead(II) bromide is an ionic compound/ ionic structure) 1 1 (ii) Lead is a metal/ The bonding between
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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 solution. What about the ratio
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