CM-UY 1004 Lecture Notes - Lecture 13: Ionic Bonding, Electronegativity
20 Sep 2016
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Document Summary
The periodic table is a very useful reference tool in chemistry. If used properly, it can yield lots of useful information. There are many trends that can be observed, listed here: Groups:- atomic radius decreases down the group - ionization energy increases up the group - metallic character increases down a group - Periods:- atomic radius decreases across the period- ionization energy increases across the period - metallic character decreases across the period - electronegativity increases across the period. Electronegativity is the tendency of an element to attract electrons. This could also be interpreted as the likeliness that the element will have a negative charge in an ionic bond. It could be remembered easily by remembering electronegativity , or its tendency to be negative. You can also think of electronegativity as how much an element wants electrons. There"s also electropositivity in the opposite end of the spectrum; this is the tendency of an element to donate electrons and become positive.
