during the Peloponnesian wars‚ and the building never reached completion for unknown reasons. It consists of a central building and two wings. The colonnades along the west and east sides had a row of Doric columns while two rows of more slender Ionic columns divided the central corridor into three parts. The Doric columns recall those of the Parthenon‚ although they are much more severe. The central gate hall has two chambers. The north one was used as a painting gallery‚ while the south
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substance. Intramolecular forces: covalent and ionic bond within compounds. Attractive forces between molecules are mainly due to hydrogen bonding. Ion-ion attraction The energy of attraction between two oppositely charged ions is directly proportional to the charges on the ions and inversely proportional to the distance of separation. Ionic compound has high melting points. The product q+ q- increases as the charges on ions increase. Ionic substances containing multiply charged ions usually
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Cup o’ Noodles: Through the Eyes of a Chemist Background: Before completing this experiment‚ one must know about chemical formulas‚ ionic bonding‚ solutions and moles to understand the results of this experiment. A chemical formula is the symbol for compounds and elements. It tells chemists how many atoms are in a chemical compound‚ formula unit or molecular compound. In a chemical formula a subscript indicates how many atoms there are of an element before it. The coefficient in a chemical formula
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produce when mixed with another reagent. After careful observation‚ be able to prove each observation using the net ionic equation. Background: First‚ a double-replacement reaction is when two cations in different compound switch anions‚ AX + BZ → BY. If either compounds are insoluble a precipitate occurs‚ and if there is no precipitate formed there is no reaction. Also‚ not all ionic compounds are soluble in water‚ and there are a few solubility rules that need to be followed (see Chapter 8 in book)
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sorption of CIP cannot be ignored. On the other hand‚ it is a re-confirmation of the complexity of the pharmaceuticals sorption in sediments‚ or to every other sediments need to special approach. Ionic strength is also important adsorbing component of sediments. The influence of initial CIP concentration and ionic strength in equilibrium sorption of CIP by sediments at 25 °C are presented in Figure 3. Figure
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My research question is: What architectural impact did the pillars of the Parthenon have on the building? Have you ever seen a building so magnificent as the Parthenon? I decided to research this monument because it is a very famous landmark and also has some history behind it.The Parthenon is located in Athens‚ Greece. Inside the Parthenon there is a large statue of Athena known as the Athena Parthenos. The Parthenon was designed by Phidias and was built between 447 – 432 BCE (It was finished
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Introduction and Background | The demonstration illustrates the electronegativity and polarity of water molecules. It displays the strength of intermolecular forces vs. the strength of water’s electronegativity and how that determines solubility of ionic compounds. This demonstration is beneficial to use in both the Solution and Solubility‚ and Chemical Reactions units. | Materials | distilled water – saturated sodium bicarbonate (NaHCO3) – 20% sodium carbonate solution (Na2CO3) - phenolphthalein
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Hwa Chong Institution (High School) Secondary 4 End of Year Examinations Chemistry Revision Notes List of topics: 1. Atomic Structure 2. Separation Techniques 3. Chemical Bonds and Bonding (Ionic‚ Covalent) 4. Metals 5. Properties and structures of compounds 6. Qualitative Analysis 7. Acids‚ Bases and Salts 8. Chemical Periodicity 9. Chemical Calculations 10. Air and Environment 11. Electrochemistry (Including Redox reactions) 12. Thermochemistry 13. Rates of Reaction 14. Chemical
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Although the human race evolves with time‚ there are still many architectural replications of Greco-Roman forms in modern day society of today. The times of the great Ancient Greek and Roman Empires have longed passed‚ but the people of today are still able to admire and honor their inconceivable architectural innovations. The Greco-Romans were very creative societies that worked collectively to build larger and more majestic things than had ever been built before. These stylistic ideas and works
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energy of the aggregate is ______than that of the separated atoms. ____________ – energy required to break a chemical bond Bonding involves ________________. 2 Chemical Bonds‚ cont. In general‚ there are three types of chemical bonds: I. Ionic bond: Transfer of electrons from one atom to another. Seen primarily in M + NM. Bond is an electrostatic attraction of of a _______for an ______. II. Covalent bond: Results from a ________ of outermost electrons. A. __________covalent: ______
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