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Trends

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jajalosi's version from 2015-04-27 02:53

Section

Question Answer
Zeff calculationatomic # - shielding (valence electrons)
Zeff trendincreases across a period, decreases down the rows
Ionization energy trendincreases across a period, decreases down the rows
Electron Affinityincreases across, highest in halogens 0 in NG's, decreases down the rows--mesure of metallic character
Intermolecular forces in increasing strength orderDispersion, Dipole-Dipole, Hydrogen Bonding, Ion-Dipole
Intermolecular forces and boiling/melting pointthe higher the forces, the higher the melting/boiling point
Viscosity trendincreases w intermolecular forces, molar mass & molecule length
Surface tension trenddecreases with decreasing intermolecular forces
Bond Strengthincreases with smaller length (triple bond shorter than single bond = stronger)
Bond Strength of equal length between same vs different moleculesstronger with same molecule
Electron Sea modelmetal atoms pool electrons into electron sea, accounts for electrical conductivity and malleability
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