electronegativity-handout - Electronegativity...

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Electronegativity Electronegativity δ + δ δ 0 δ 0 HC l HH Electronegativity Electronegativity • Electronegativity describes how electrons are shared in a compound • Consider the compound HCl • The electron clouds represent where the two electrons in the HCl bond spend their time (sizes of atoms are not being shown) • The shared electrons spend more time around Cl than H. In other words Cl is more electronegative than H. l δ + δ Electronegativity table table • The relative attraction for electrons is summarized in figure 7.11 (pg. 255) • These numbers are derived from several factors including EA, IE, ENC, atomic radius • You do not need to understand where the numbers come from • You need to know that a high number means the element has a greater pull on electrons • You will also need to calculate the difference between values to estimate the % ionic or % covalent character of a bond • PE 12 (pg. 256). Reference: 7.10.
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