Trends in the Periodic Table - PowerPoint PPT Presentation

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Trends in the Periodic Table

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Title: Trends in the Periodic Table Author: Philip Stone Last modified by: Philip Stone Created Date: 2/2/2007 1:59:05 PM Document presentation format – PowerPoint PPT presentation

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Title: Trends in the Periodic Table


1
Trends in the Periodic Table
2
Three Main Subdivisions
  • The periodic table can be split into many
    different ways
  • The 1st way we will split it up is by metals,
    non-metals, and metalloids

3
Metals
  • The metals make up the left hand side of the
    table. They start with Group 1 and move right
    until the stair step line
  • Metals have properties such as shiny, malleable
    (you can shape it), ductile (you can draw it into
    wire), good conductors of heat and electricity

4
Nonmetals
  • These lie to the right of the stair step line
  • They are poor conductors of heat and electricity
  • They are brittle, shatter, some are gasses, some
    are solid and as well some liquid

5
Metalloids
  • There are six elements that have properties of
    both metals and non metals. They are called the
    matalloids
  • The six are Boron, Silicon, Germanium, Arsenic,
    Tin, and Antimony
  • Closer you get to the metals like Ge, the more
    properties of a metal. Si is more like a non
    metal

6
Periodic Trend
  • Periods go across the table, and groups go up and
    down
  • Period 1 is only made of H, and He
  • Group 1 is also made up of H, but also Li, Na, K
    and so on

7
Periodic Trends cont.
  • As you go across from left to right, atomic size
    goes down, even though the nucleus has more
    protons
  • As you go from the last element in a period to
    the next at the start of a new period, the size
    increases dramatically. Why?

8
Names of the 9 Groups
  • Group 1 are the Alkali metals
  • Group 2 are the Alkaline earth metals
  • Transition metals are groups 3-12
  • Groups 13-16 are named after the 1st element in
    the group
  • Group 17 are the halogens
  • Group 18 are the noble gases
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