1. Roy Kennedy Massachusetts Bay Community College Wellesley Hills, MA Introductory Chemistry , 3 rd Edition Nivaldo Tro Chapter 4 Atoms and Elements 2009, Prentice Hall

11. Tro's "Introductory Chemistry", Chapter 4

14. The Periodic Table of Elements Tro's "Introductory Chemistry", Chapter 4 Atomic number Atomic mass Element symbol

17. Periodicity Tro's "Introductory Chemistry", Chapter 4 = Metal = Metalloid = Nonmetal

21. Tro's "Introductory Chemistry", Chapter 4 = Halogens = Lanthanides = Actinides = Alkali metals = Alkali earth metals = Noble gases = Transition metals

33. Practice—Fill in the Table. Tro's "Introductory Chemistry", Chapter 4

34. Practice—Fill in the Table, Continued. Tro's "Introductory Chemistry", Chapter 4

37. Tro's "Introductory Chemistry", Chapter 4 Li + Na + K + Rb + Cs + Be 2+ Mg 2+ Ca 2+ Sr 2+ Ba 2+ Al 3+ Ga 3+ In 3+ O 2  S 2  Se 2  Te 2  F  Cl  Br  I  N 3  P 3  As 3  1A 2A 3A 7A 6A 5A

41. Neon Tro's "Introductory Chemistry", Chapter 4 9.25% 22 12 10 Ne-22 or 0.27% 21 11 10 Ne-21 or 90.48% 20 10 10 Ne-20 or Percent natural abundance A, mass number Number of neutrons Number of protons Symbol

45. Practice—Complete the Following Table. Tro's "Introductory Chemistry", Chapter 4

46. Practice—Complete the Following Table, Continued. Tro's "Introductory Chemistry", Chapter 4