CHEM 1220 Chapter Notes - Chapter 22: Ionic Bonding, Intermolecular Force, Ionic Radius
9 Apr 2015
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Chapter # 22 : chemistry of main-group elements: Moving left to right through the periodic table, metallic character decreases and bonding changes from ionic bonding to covalent bonding. In transition between ionic to covalent bonding, there are a group of elements in between that react with fluorine to give network covalent compounds. Chemical reactions occur to allow atoms to achieve stable filled shells that are energetically favoured such as those of noble gases (electronic configurations: ns2np6, except n=1) Have weak intermolecular forces, therefore very low b. p and m. p. Noble gases are very stable and therefore do not normally form compounds - xenon is an exception as it can form compounds with fluoride and oxide. In their elemental states, halogens form diatomic molecules (ex. In nature, they are found combined with other elements. M. p. and b. p. increase down the group due to van der waals forces.
