2. Big Ideas about the beginnings Creator of Periodic Table- Dmitri Mendeleyev He put all the elements on cards to help him organize He organized the elements with similar chemical properties into columns and rows From this organization, it left holes, BUT this gave chemists clues as to what elements were still left to discover
3. Periodic Table Now… Elements are organized by properties and put into periods (columns) and groups (rows) Types of Classification- Alkali Metals, Alkali Earth, Metals, Nonmetals, Halogens, Metalloids, Lanthanoids, Actinoids, Nonmetals, Noble Gases, Transition Metals
