Properties of Water Introduction: Water’s chemical description is H2O. As the diagram to the left shows‚ that is one atom of oxygen bound to two atoms of hydrogen. The hydrogen atoms are "attached" to one side of the oxygen atom‚ resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side‚ where the oxygen atom is. This uneven distribution of charge is called polarity. Since opposite electrical charges attract‚ water molecules
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“WATER IS A GOOD SOLVENT” Water is very unique in all facets of its nature. The chemical formula for water is H2O as a water molecule consists of two atoms of the chemical element hydrogen (H) and one atom of the element oxygen (O). Water is the most abundant chemical compound on earth as its mass all exists together‚ naturally‚ in its gaseous‚ liquid and solid state. It is the most precious natural resource to man and is essential to life for all discovered living organisms. One of the unusual
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current understanding of the atom today. Each one of them played a special role in the development process of the atom and most importantly‚ they all reflected on one another. Many influential scientists follow up on one another proving their own theories correct and in time‚ create challenges for the next scientist to question. This truly‚ is one of the main reasons we have gotten so far with the atom. These amazing discoveries mostly started
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that the atomic mass of an element is usually not a whole number. That happens because of isotopes. An atom that is missing a neutron or has an extra neutron is called an isotope. They are still the same element; however‚ they are just a little different from every other atom of the same element. Most of the carbon atoms in the universe are Carbon-12‚ with 6 neutrons. A small percentage of carbon atoms are Carbon-13‚ with 7 neutrons‚ and an even smaller percentage are Carbon-14 and have 8 neutrons. Carbon-13
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Chemical bond From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds"
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technology is one useful spinoff of basic research into the structure of the atom. Research‚ however‚ is expensive. Many people argue that the high cost of research outweighs its potential benefits. Provide one argument for and one argument against increasing current funding for atomic-structure research. Use specific examples from this lesson in your answer to support each position. One argument against continuing research on the atom is that the cost continues to increase at an alarming rate‚ and the
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Part 1 of 1 - 92.0/ 100.0 Points Question 1 of 25 4.0/ 4.0 Points Which one of the following is not a system? A. a leaf B. a tree C. a mountain range D. Earth Correct E. All of these are examples of systems Answer Key: E Feedback: See "The system concept" in Chapter 1. All of the above examples are described as systems. “A system may be large or small‚ simple or complex (Figure 1.6). It could be the contents of the beaker in a laboratory experiment
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Organic Chemistry Basic Ideas: Carbon chains: Straight chains and branched chains‚ Numbering of chains and branches. Carbon Rings: Cyclic Molecules‚ Aromatic Compounds Types of Organic reactions: Combustion Addition Substitution Condensation Oxidation What is organic chemistry? Carbon compounds. Methane CH4 Hexane C6 H14 Ethane C2H 6 Heptane C7 H16 Propane C3H 8 Octane C8 H18 Butane C4H10 Nonane C9H20 Pentane C 5 H12 Decane C1 0 H22 Alkanes: Saturated Hydrocarbons
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flow freely from atom to atom and molecule to molecule. An object made of conducting material will charge to be transferred across the entire surface of the object. Metals like silver‚ gold and aluminium are good insulators as it ‘conducts’ the electron current or flow of electrons fairly easily. What is an insulator? Insulators have the opposite effect on the flow of electrons; they do not let electrons flow very easily from one atom to another. Insulators are materials whose atoms have tightly bound
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Trends in Ionization Energy Period trends All the atoms in the same period have the same valence energy level and the same shielding. The increasing nuclear charge increases the attraction of valence electrons so ionization energy generally increases from left to right. The exceptions at full and ½ filled orbitals break the pattern because removing an electron from a stable (low energy) configuration will require more energy. Li has a low 1st ionization because 2 core electrons block the +3 nuclear
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