(L5)the periodic table
PERIODICITY Guys, Groups, Trends, Creations Guys.
1 Chapter 3: Atoms & Elements Mixtures & Pure Substances Elements & Symbols The Periodic Table Atomic Structure Isotopes Electron Energy Levels.
CHAPTER 6
1. 2 About 70 elements had been discovered by the mid-1800’s, but no one had found a way to relate the elements in a systematic, logical way.
Chapter 6
