Discussion no. 2 The Nomenclature of Inorganic Compounds Discussion no. 3 The Periodic Table of Elements Sta. Maria‚ Yza Suaco‚ Trisha Marie T. Teves‚ Joan Marie Vale‚ Kate IN-9 Group 9 I. Introduction Representing molecules as images allows us to impart a great deal of information concerning molecular structure. But these molecules can also be named‚ and there are occasions when this is more convenient than drawing a picture. In the early days of chemistry‚ the list of known compounds
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As scientists started researching atoms‚ many had different ideas on what was actually going on inside the atoms and what the atoms looked like. A few of these scientists were Niels Bohr‚ J.J. Thompson‚ John Dalton‚ and Earnest Rutherford. These four men defined what atomic theory was with all the research and experiments they did. They each came up with ideas about atoms. John Dalton: John Dalton was born September 6‚ 1766. Dalton’s father worked as a weaver‚ his father owned a small plot of land
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case of conjugation that leads to an especially stable bonding arrangement. The benzene ring consists of six sp2 hybridized carbon atoms in a regular hexagon. Each carbon forms two σ-bonds with adjacent carbons‚ and a third σ-bond with a hydrogen atom. The 2p orbital on each atom is available for π-bonding. Interaction between the p orbitals on the six carbon atoms forms a conjugated system of π-electrons. Molecules with this bonding arrangement are called aromatic molecules. For convenience
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major technology in development of every machine in coming years.” (Wifinotes‚ n.d.) Nanotechnology will greatly improve the functionality and performance of computers. Body In everyday terms‚ “Nanotechnology is based on manipulations of individual atoms and molecules to build complex atomic structures.” (Tarasov‚ 2009‚ pg. 1) Working at the atomic level is a very new technology. The size of a nanometer is one-billionth of a meter. For comparison purposes‚ “A very fine human hair is about 10‚000
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favour of the Rutherford atomic model‚ this model has electrons orbit the tiny positive nucleus. 3. Provide a comprehensive description of the gold foil experiment that Rutherford and his associates used to further investigate the structure of the atom. Rutherford had a piece of gold foil and the opposite to gold‚ a zinc sulfide screen that emits a flash of light when hit by an alpha particle‚ the gold was placed in front of the screen and with a gap between the two as too not touch‚ most of the
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Introductory Chemistry‚ 2e (Tro) Chapter 9 – Electrons in Atoms and the Periodic Table True/False Questions 1) When the elements are arranged in order of increasing number of protons‚ certain sets of properties recur periodically. 5) A particle of light is called a packet. 9) Ultraviolet light produces suntans and sunburns. 13) Electrons behave like particles and we can describe their exact paths. 17) The ground state is when an electron in an atom is excited into the lowest possible vacant orbital. 21)
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Biology Exam Review Unit One – Biochemistry What is an isotope? Isotope - An isotope is all atoms of the same element that have the same number of protons‚ but they may have different numbers of neutrons in the nucleus. - This means that all atoms with the same atomic number can have different atomic masses. - Because they have the same number of protons and electrons‚ they behave exactly the same in chemical reactions. Radioisotope - The nuclei of some isotopes of an element are unstable
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Part I: Atomic Structure – Fill in the missing information on atomic structure and organic compounds. Atomic Structure Subatomic Particle Charge Location in an Atom Proton Positive Nucleus Neutron Neutral Nucleus Electron Negative Spherical (outer-shell) Organic Compounds Large Biological Molecule Atoms it Contains Monomer(s) Function(s) in Living Organisms Carbohydrates C‚ H‚ and O Monosaccharides Source of energy Lipid C‚ H‚ and O Glycerol and fatty acids Cushion
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small fraction of the total volume of the atom that held most of the mass of the atom” (Chem Teacher). His nuclear model then replaced the Plum Pudding model. Even though all of Rutherford’s discoveries are exceedingly important‚ I believe that the most important one is‚ his discovery of the an atom’s nuclear structure The atom now consist of a positive nucleus with negative electrons in circular orbits around it. In addition to this‚ he discovered that atoms have a dense core (nucleus) where protons
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sizes of ions and atoms d. Students know how to use the periodic table to determine the number of electrons available for bonding. I explain to my students that columns 4A-7A are ’wanna be’ noble gases‚ ie want 8 valence e- (except for first period since only need 2 e-). The elements are listed in columns and each of the A columns gives the number of valence electrons. Transition metals of course don’t follow the same rules‚ so just talk about columns 1A-8A. The atoms in columns 1A-4A can
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