in early Greek architecture: the Doric‚ Ionic and Corinthian. The Doric style was common in mainland Greece and later spread to the Greek colonies in Italy. The Ionic style was employed in the cities of Ionia along the west coast of Turkey and other islands in the Aegean. Where the Doric style was formal and austere‚ the Ionic was less restrained and more decorative. The third style‚ Corinthian‚ came later and represented a more ornate development of the Ionic order. The differences between these styles
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Properties of Different Bonds An ionic compound forms from a nonmetal and metal element. A covalent compound is formed by two non metal elements. A metallic compound is formed by two metal elements. Metallic compounds have generally high melting points‚ are loose and flexible with their electrons‚ conduct electricity well‚ and have low solubility in water. Ionic compounds are generally crystals‚ have a high melting point‚ and usually have high solubility in water and conduct electricity well when
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smaller pieces with a hammer. Even though there was two different types of Sodium chloride‚ coarse and fine‚ they still had a symmetrical‚ three-dimensional shape. All ionic compounds have this structure. It was also found that Sodium chloride had a high melting point and sugar had a low melting point. This is because Sodium chloride is ionic and the bonds holding it together take much more energy to break. Sugar‚ on the other hand‚ is covalent so it took less energy because the bonds aren’t as strong
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Results Table: Acids and Bases Lab 2 Compound |Observations |Type of Compound (Acid/base? Ionic/Covalent?) |Amount (Drops) |Conductor of Electricity? Yes/ No | |NaOH (0.5 mol/L) Reactant |Clear‚ odourless‚ liquid |Base Ionic |20 |Not tested | |Phenolphthalein Indicator |Clear‚ liquid‚ alcohol odour |pH indicator |1 |Not Tested | |HCl (0.5 mol/L) Reactant |Clear‚ liquid‚ sour odour |Acid Ionic |44 |Not tested | |H2O (water) Product |Clear‚ liquid‚ odourless |Non-reactive Covalent
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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 lead atoms in solid is metallic bond. There exists mobile/ delocalized (freely-moving) electrons in lead ∴ it conducts electricity
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represent the ratio of molecules of each substance involved in a chemical reaction. Weight Percentage is a percentage based on weights. Mole percentage is a percentage based on the numbers of atoms or moles. Formula units is the simplest form of an ionic compound
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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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CHM130 Lab 7 Determining the Formula of a Compound A. Data Table (show completed data table here) (12 points) |Measurements |Mass (in grams) | |Mass of empty 100 mL beaker |55.45 g | |Mass of zinc metal
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bonds B) ionic bonds C) acid bonds D) nonpolar bonds E) none of the above 2. Most of water’s unique properties result from the fact that water molecules _____. A) are very small B) tend to repel each other C) are extremely large D) tend to stick together E) are in constant motion 3. Each water molecule is joined to _____ other water molecules by ____ bonds. A) two ... hydrogen B) four ... hydrogen C) three ... ionic D) four
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1.1 INTRODUCTION Chemical bonding – the force of attraction between the two atoms Valence electron – the outer most shell electrons There are three types of chemical bonding i. Ionic bond: ________________________________________ ii. Covalent bond: _____________________________________ iii. Dative Covalent bond: _______________________________ 1.1.1 LEWIS DOT SYMBOL A shorthand to represent the valence electron of an atom. The element symbol
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