Bonding

I. Types of Bonds

                A. There are 3 main types of bonds

                                a. Ionic (metal and non-metal)

                                                i. electrons are transferred from metal to non-metal

                                b. covalent (non-metal and non-metal)

                                                i. electrons are shared between non-metals

                                c. metallic (metal and metal)

                                                i.holds pure metals together by electrostatic attraction

II. Electronegativity

                A. Electronegativity (en)* is a measure of an atom's attraction for electrons in a bond

                B. Atoms with a bigger en attract/want electrons more

                C. Polar covalent bonds form from an unequal sharing of electrons

                D. Non-polar covalent bonds form from unequal sharing of bonds

III. Bonds

                A. The type of bond formed can be predicted by looking at the difference in electronegativity of elements

                                a. en > 1.7 = ionic bond

                                b. en < 1.7 = polar covalent bond

                                c. en = 0 = non-polar covalent

bond