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chem notes 2 gen - Octet Rule – representative elements...

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3 Types of Bonding: o 1. Ionic o 2. Pure covalent bond (non-polar covalent bond) o 3. Polar covalent bond Determine the polarity of a bond by… Electronegativity – the ability of an atom to attract electrons o Opposite ionization energy – give up an electron Polar bond has an electronegativity different between atoms Polarity is measured by dipole moment (vector) o Which direction (atom) the electrons prefer The greater the electronegativity difference, the more polar the bond Structure of compounds and ions: o Lewis Structures (Lewis Formula, electron dot formula) Shows how the valence electrons are arranged in a compound Atoms want to achieve a noble gas configuration
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Unformatted text preview: Octet Rule – representative elements want to have (share) 8 electrons to achieve the noble gas stability Except H only wants 2 electrons (duet rule ) • Rules for Drawing Lewis Structures o 1. Must include all valence electrons Sum all of the valence electrons and show all valence electrons in Lewis structures o Anion – add 1 electron for each negative charge o Cation – subtract 1 electron for each positive charge o 2. Atoms that are bonded share one or more pairs of electrons o 3. Electrons are arranged so all atoms have a filled valence shell (octet rule & duet rule )...
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