3. In an IONIC bond, electrons are lost or gained, resulting in the formation of IONS in ionic compounds. FK

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10. FK + _

11. FK + _ The compound potassium fluoride consists of potassium (K + ) ions and fluoride (F - ) ions

12. FK + _ The ionic bond is the attraction between the positive K + ion and the negative F - ion

13. Electronegativity A measure of how strongly an atom attracts electrons in a chemical bond. A measure of how strongly an atom attracts electrons in a chemical bond. Fluorine is the most electronegative element on the table, because it is small and only needs to gain one electron to have an octet. Fluorine is the most electronegative element on the table, because it is small and only needs to gain one electron to have an octet. Francium is the least electronegative element. Francium is the least electronegative element.

14. Ionic Bond Between atoms of metals and nonmetals with very different electronegativity Formed by the transfer of electrons Conducts electricity in solution Examples; NaCl, CaCl2, K2O

16. Ionic Bonds: One Big Greedy Thief Dog!

17. In covalent bonding, atoms still want to achieve a noble gas configuration (the octet rule). But rather than losing or gaining electrons, atoms now share an electron pair. Covalent Bonding

18. Covalent Bond Between nonmetallic elements of similar electronegativity. Between nonmetallic elements of similar electronegativity. Formed by sharing electron pairs Formed by sharing electron pairs Stable molecules, not conducting in solution Stable molecules, not conducting in solution Examples; O 2, CO 2, C 2 H 6, H 2 O, Examples; O 2, CO 2, C 2 H 6, H 2 O,

20. Polar Covalent Bond A bond between nonmetals with a small difference in electronegativity. A bond between nonmetals with a small difference in electronegativity. Electrons are shared unequally. Electrons are shared unequally. H2OH2OH2OH2O

21. Polar Covalent Bonds: Unevenly matched, but willing to share.