7.10 How does HCl differ from Cl 2 with respect to the sharing of electrons? In Cl 2 there is an equal sharing of electrons between the two Cl atoms. In HCl, Cl has a greater pull on the electrons. What happens in a molecule due to differences in the pull on electrons (give term and symbol)? Partial charges result. A partial charge is represented by a lowercase delta (i.e. δ ), where a positive partial charge is δ + and a negative partial charge is δ-. What name is given to a bond that has partial charges? It is known as a polar bond (because it has + and - poles). The bond is also said to be a dipole (di meaning two). How is a dipole represented graphically? , where the arrow points to δ-, and the cross on the arrow is at the positive pole (as a mnemonic, remember that the cross resembles a +). What term is used to describe the relative attraction of an atom for the electrons in a bond? Electronegativity. What is the electronegativity table? Why is it useful? A periodic table, where each element is assigned a numeric value for electronegativity. It is useful because it allows the determination of
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 04/12/2011 for the course CHEM 1010 taught by Professor Marshall during the Spring '11 term at North Texas.