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study-note-2-19 - 7.10 How does HCl differ from Cl2 with...

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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
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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.

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