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The best explanation for the uniqueness principle of atomic size is what?
Wiki User
∙ 12y ago
The small sizes of the period 2 elements(elts) give them the unique abilities such as they turn to have lower electron affinity(E.A) values than the periods 3 elts e.g the E.A for F< that for Cl not as expected for the E.A trend decreases down the group this is associated to the small size of the periods 2 elts because their small sizes cause electron-electron repulsion.
Their small sizes also enables them to form covalent bonds on like their heaver elts in the same group that form ionic bonds e.g Li+ Cl- forms a covalent bond because due to the small size of the Li+ it distort the electron cloud around Cl- hence forming a covalent bond which is polar and can be dissolved in a polar solvent
Wiki User
∙ 12y ago
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