see that the reactivity of the elements increase‚ this is due to the number of electrons increasing on the shell. This also once you go down the table; the shells become further and further apart from the nucleus so the bonding is a far weaker‚ the orbitals also increase when shells increase making the element more reactive than the previous compounds. The other trends that can be found when looking at the table is that the ionization energy is at its highest when looking at noble gases or hydrogen
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9.1 Orbitals and Theories of Chemical Bonding 1. Which one of the statements concerning valence bond (VB) and molecular orbital (MO) bond theories is correct? a) MO theory predicts that electrons are localized between pairs of atoms. b) In VB theory‚ bonding electrons are delocalized over the molecule. c) MO theory accurately describes bonding in O2 and NO‚ VB theory does not. d) VB theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict
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Hybrid Electric Cars‚ Combustion Engine driven cars and their Impact on Environment. Z. Čeřovský*‚ P. Mindl* * Czech Technical University in Prague‚ Praha 6‚ Technická 2‚ Czech Republic Estimated vehicle number on the Earth 3 Total vehicle number in Milliards Abstract--Paper stresses the negative influence of cars on the environment. Hybrid cars technology can diminish the fuel consumption and green house gases production. Different types of electric hybrid powertrains are described
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Wavelength‚ frequency‚ and amplitude and energy. As a person in science‚ i should know the order of colours in the visible spectrum and the span of visible wavelengths. Question: if light is a .. Answer: max planck proposed that e.m radiation comes in units of defined energy rather than in any arbitrary quantities. Planck called it quantum The Photoelectric Effect Planck’s theories were used to explain a number of observations that had been troubling scientists. Einstein extended
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CHEMISTRY 17 1ST LONG EXAM REVIEWER I. ELECTRONIC STRUCTURE OF ATOMS -arrangement of atoms’ electrons -the number of electrons in an atom -distribution of electrons around the nucleus and their energies • ATOMS *Billiard Ball Model (JOHN DALTON) *Plum Pudding Model (JOSEPH J. THOMPSON) *RUTHERFORD’s Model of Atom -atoms are tiny‚ hard‚ indivisible spheres -electrons (negative charge) occupy the atom - Atom is mostly empty space with a dense nucleus • PROBLEMS with Rutherford’s Model
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html http://dwb4.unl.edu/chemAnime/atomic_orbits.htm http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf Salient Features Chemistry animation and videos Atomic orbital animations Hybridization animation http://jchemed.chem.wisc.edu/JCEDLib/WebWare/collection/open/JCEWWOR019/mo Molecular orbital theory animations movies.html http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/activa2.swf http://dwb4.unl.edu/chemAnime/Electro.htm Activation energy animation Electrochemistry
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CH 16 - the name of this functional group class is historically derived from the pleasant aromas associated with many of its constituent compounds discovered in past centuries - although not all aromatic compounds known today share the same distinction (many are in fact‚ odorless or even unpleasant)‚ they are the principle components in such pleasant smelling substances as cinnamon‚ licorice‚ wintergreen‚ clove & vanilla CLASSIFICATION – - also known as arenes‚ many aromatic compounds possess
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Pages: 1 – 11 SECTION A Answer ALL THIRTY questions from this section 1. If you move one element to the right on the periodic table which ONE of the following is always TRUE? A. an extra electron is added to a previously empty orbital B. the charge on the atom increases by 1 C. the number of neutrons increases by 1 D. the number of protons increases by 1 E. all of the above 2. Which ONE of the following best describes what happens when an electron moves to a lower energy
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Knight Engines – Excalibur Engine Parts Issues in negotiation: Sale of produced units Price Branding/ advertisement Long term relationship leading to further sales Both parties are interested in coming to an agreement. We (Excalibur Engines) are interested in selling these pistons but only at a price of $480 or more per piston. If an agreement can be reached we have the possibility of making a profit‚ branding and developing a relationship with Knights Engine Parts. Priority
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CHEMISTRY 1. States of Matter: Solid‚ liquid and gaseous states(general characteristics)‚ Change of states‚ effect of change of temperature and pressure on states of matter‚ evaporation‚ mixture‚ solution‚ its type and its concentration(percent strength by volume and by mass)‚ separation of components from a mixture using various physical methods‚ physical and chemical changes‚ compounds 1. NCERT class IX text book (chapter 1 and 2) 2. Foundation Science(Chemistry) :Class IX A. K. Singh ( Bharati
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