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Review (Chapter 1) 1) ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( Indicate if the following statements are true ( √ ) or false ( X ) ) Fishhook arrows are used to indicate the movement of a pair of electrons. ) The angle between sp2 hybrid orbitlas is 104.5. ) Bromine is more electronegative than chlorine. ) Nitrogen is less electronegative than oxygen. ) The valence of silicon is 4 ) Sodium is more electropositive than lithium. ) increasing atomic size increases the electropositivity of metals. ) Polarity of bonds depends on their atonmic size. ) Polarity of molecules depends on their melting points ) The electronegativity increases across a period from left to right ) Structrural isomers differ in the arrangement of atoms ) constitutional isomers are structural isomers ) structural isomers have different emperical formuls ) double headed arrows are used to indicate reversable reactions ) The carbon in tetrabromomethane is SP4 hybridized ) The carbon-carbon bond in propane is formed from Sp3 and S orbitals ) Cyclic organic compounds contains always heteroatoms ) Alkanes have only one double bond 2) * Draw a Lewis structure for the following compounds, and assign the formal charge for the central atom PCl3, H2S, CBr4, XeF4, H3O+, PO43-, * Draw the orbital picture of the following Methane, bromomethane, ethane, hexachloroethane * Draw all possible structural isomers for the compounds having the following formulas C2H4Br2, C2H3Cl3, C3H7F, C3H6I2 * Answer questions 1.53 - 1.55 from your book Good luck