Periodic Trends PDF

Day 1 - Notes Unit: Periodic Trends Basics of the Periodic Table Copyright © 2011 - MsRazz ChemClass  After today, you should be able to… Describe how the m...

Day 1 - Notes Unit: Periodic Trends Basics of the Periodic Table Copyright © 2011 - MsRazz ChemClass  After today, you should be able to… Describe how the modern Periodic Table is arranged Explain basic similarities and differences among groups and periods on the Periodic Table Locate and label common groups on the Periodic Table Locate and list properties of metals and nonmetals Describe what a metalloid is Copyright © 2011 - MsRazz ChemClass  History of the Periodic Table: Dmitri Mendeleev Mendeleev (1869): Organized the elements by increasing atomic mass AND so that elements in the same row have similar properties. TED-Ed: The Genius of Mendeleev’s PT Copyright © 2011 - MsRazz ChemClass  History of the Periodic Table: Henry Moseley Moseley (1913): Rearranged the elements by increasing atomic number. This is how the modern Periodic Table is arranged today. Copyright © 2011 - MsRazz ChemClass  Periodic Law: “When elements are arranged in order of increasing atomic number, there is a periodic pattern in their physical and chemical properties.” Copyright © 2011 - MsRazz ChemClass  Period: (series) The horizontal rows of the Periodic Table Group: (families) The vertical columns on the Periodic Table Copyright © 2011 - MsRazz ChemClass  Elements in the same group have similar properties. Groups are numbered 1-18 Copyright © 2011 - MsRazz ChemClass  Elements in the same period do not have similar properties. Periods are numbered 1-7 But they do have the same number of occupied energy levels. Copyright © 2011 - MsRazz ChemClass  Blocks on the Periodic Table: s and p blocks= Representative elements d block = Transition metals f block = Inner transition metals Copyright © 2011 - MsRazz ChemClass  Common Names for Specific Groups on the Periodic Table: Alkali metals Noble gases Halogens Alkaline earth metals Copyright © 2011 - MsRazz ChemClass  The “staircase…” Copyright © 2011 - MsRazz ChemClass  Metals vs. Nonmetals Left of staircase Right side of staircase (include hydrogen!) Lustrous (shiny) Non-lustrous (dull) Malleable (hammer Brittle (breaks easily) into thin sheets) Ductile (make into thin wire) Good conductors of Poor conductors (good heat and electricity insulator) Copyright © 2011 - MsRazz ChemClass  Metalloids: Touch the staircase and have properties of both metals and nonmetals. (Note: Al is a metal!) They are semiconductors which means they normally do not conduct electricity but will conduct at high temperatures or when certain substances are added. Copyright © 2011 - MsRazz ChemClass  Phenomenon: Alkali metals + Water Copyright © 2011 - MsRazz ChemClass  Questions? Begin Worksheet #1 Copyright © 2011 - MsRazz ChemClass