6.6 Polar covalent bonds result from an uneven sharing ofelectrons What is the distribution of a ∴t, Shared pair of electrons in a covalent bond? H: H In hf the shared electrons are drawn more close to f In H,, evenly shared atom. so the fluorine side of bond is electrically H:F=了 、,单 negative while the hydrogen side of bond is electrically positive. This kind of charge separation is called a dipole(偶极 in HF, unevenly shared
6.6 Polar covalent bonds result from an uneven sharing of electrons What is the distribution of a shared pair of electrons in a covalent bond? In HF the shared electrons are drawn more close to F atom, so the fluorine side of bond is electrically negative while the hydrogen side of bond is electrically positive. This kind of charge separation is called a dipole (偶极). In H2 , evenly shared in HF, unevenly shared
The ability to draw bonding electrons is decided by the atoms electronegativity(电负性) Increasing electronegativity 3A 4A 5A 6A 7A 訂5黜 BC O 2.5 2.02 54.0 岛翌 3B 4B 5B 6B 7B -8B 1B 2B 閻;盟25 Rb SrY In Sn Sb 081.012 1.71.819 型2口 喜副删閻黜盟岛盟劉围焉盟E 喜岛岛口口
The ability to draw bonding electrons is decided by the atom’s electronegativity (电负性)