Slide 1 A TOMIC T HEORY Slide 2 I N THE B EGINNING Atoms originally named by _____________ Believed the a substance could be divided over and over again only to a point If…
Slide 1C2 Topic 1 and 2 Slide 2 C2.1 Mendeleev Mendeleev created the periodic table in 1871. He arranged elements in order of their properties. -groups = down. -period= across…