Intermolecular forces 4.0 / 5 based on 1 rating ? ChemistryIntermolecular forcesASAQA Created by: Sopha8Created on: 21-05-14 22:08 Name the types of intermolecular bonding from weakest to strongest 1) van der waals, 2) permanent dipole-dipole, 3) hydrogen 1 of 5 Whats happens to form van der waal forces? charge clouds moving, temporary dipole where opposites attract, created & destroyed but overall attraction 2 of 5 Why are some van der waal forces stronger in some molecules? larger the molecule-more electrons, more surface area=increased van der waal forces, higher melting/boiling point 3 of 5 Between which elements do hydrogen bonds form and why? H with O or F or N, very electronegative-bonds so polarised that H forms bonds with lone pair 4 of 5 What is a permanent dipole-dipole force? delta + and - on polar molecules= weak electrostatic attraction 5 of 5
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