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Periodic Table of the Elements
u These are called the inner transition elements and they belong here
1 2 1314151617 18 3456789101112 Vertical columns are called groups or families. Elements are placed in columns by similar properties.
u Horizontal rows are called periods 12345671234567 u There are 7 periods
1A 2A 3A4A5A6A7A 8A 3B4B5B6B7B8B 1B2B 1 2 1314151617 18 3456789101112
Metals l Luster – shiny. l Ductile – drawn into wires. l Malleable – hammered into sheets. l Conductors of heat and electricity.
Non-metals l Dull l Brittle l Nonconductors - insulators
Metalloids or Semimetals l Properties of both l Semiconductors
u Group 1 are the alkali metals u They have 1 valence electron in the outer orbital or energy shell 1
u Group 2 are the alkaline earth metals u They have 2 valence electrons 2
Transition metals l Groups 3-12 l their properties do not fit in with those of any other family.
u Group 13 is called the Boron family u They have 3 valence electrons 13
u Group 14 is called the Carbon Family u They have 4 valence electrons 14
u Group 15 is called the Nitrogen Family u They have 5 valence electrons 15
u Group 16 is called the Oxygen Family u They 6 valence electrons 16
u Group 17 is called the Halogens u They have 7 valence electrons 17
u Group 18 are the Noble Gases u They have 8 valence electrons
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