The valence electrons are the electrons in the outermost principal energy level. They are always "s'� or "sand p" electrons. �in9eJhEl tc::>JaLnumb€)r of electrons possib le ins and p sublevels is .eight, there can be np more than eight valen9e electrons. ' · Oetermine the number of valenGe elecfrons in the otoms below. Example: dGrbon El�Btrdn co�fl�tfr6tioR I$ ls2 I 2s2 2p2 Carbon has 4 valence. electrons. l. fluorine 11. lithium 2. phosphorus 12. zinc 3. calc ium 13. carbon 4. nitrogen 14. iodine 5. iron 15. oxygen 6. argon 16. barium 7. potassium 17. aluminum 8. helium 18. hydrogen · 9. magnesium 19. xenon 10. sulfur 20. copper Chemistry IF8766 31 I, ©lnstn,ictlonal Fair, Inc. Lewis diagrams are a way to Indicate the number of valence electrons around an atom. • .· qre qll exqrnpl,sc:>f this type of diagrqro .. >, Draw Lewis dot dlqgrams of the following atoms. 1. calcium 6. carbon 2. potassium 7. helium 3. argon 8. oxygen 4. aluminum 9. phosphorus 5. bromine y Chemistr IF8766 10. hydrogen 32 ©lnstructlonal Fair, Inc.