BIOCHM 1090 Lecture Notes - Lecture 6: Chemical Polarity, Binary Phase, Elementary Charge
Document Summary
The shapes of molecules: vsepr: valence-shell electron-pair repulsion. Polar covalent bonds and electronegativity: polar covalent bond: one in which the electrons are attracted more strongly by one atoms than by the other, electronegativity: the ability of an atom to attract electrons in a covalent bond. 3. generally decreases going from right to left in the periodic table generally decreases groin down the periodic table within a group comparing the electronegativity of bonded atoms makes it possible to compare the polarities of bonds. 4. differences a) less than 0. 5: non polar covalent bond: 0. 5-1. 9: increasingly polar covalent bond c) 3: molecular polarity depends on the shape of the molecule. 5. symmetrical molecules can have polar bonds and be non-polar overall. Naming binary molecular compounds: binary compound: a compound formed by a combination of two different elements. 1. name the rst element in the formula, using a pre x if needed to indicate the number of atoms.
