Presentation on theme: "The Periodic Table of Elements. History of the Periodic Table 1869 : Dmitri Mendeleev Considered the father of the periodic table of elements Periodic."— Presentation transcript:
The Periodic Table of Elements
History of the Periodic Table 1869 : Dmitri Mendeleev Considered the father of the periodic table of elements Periodic - happening at regular intervals
Mendeleev’s Table Organized by atomic mass Was able to predict the existence of the element Ge based on its properties
Families of the Periodic Table
Alkali Metals Group 1 or IA Single e - in outer energy level (valence e - ) Soft, Silvery white & Shiny The most reactive metals Never found “free” in nature (always in a cmpd) Soaps are formed when alkali metals react with fat
What does MacGyver think about alkali metals???
Alkali metals react violently with water.
Alkaline Earth Metals Group 2 or IIA Have 2 valence e - Not as reactive as alkali metals Produce strong, lightweight alloys Never found “free” in nature
Beryllium Magnesiu m Calcium StrontiumBariumRadium
Good Conductors of heat & electricity Have luster Form compounds in a variety of ways Brightly colored Transition Metals Groups 3-12 Transition Metals Groups 3-12
Common Transition Metals SteelGold & Silver
The Halogen Family Group 17 or VII A - Have 7 valence e- Never found free in nature The most reactive non-metals Form salts when they combine with metals F F Cl Br I I
Properties/Reactivity of the Halogens
The Inert Gas Family Also called the Noble Gas Family Group 18 or VIIIA Have 8 valence e- Considered un-reactive Glow bright colors when energized `
Noble Gases differ in density Noble Gases are used to make neon signs