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This is our Periodic Table and Elements unit!!!mend.gif


Mendeleev- created the first periodic table using atomic mass and characteristics to sort the elements
Periodic table- table that uses atomic number to organize the elements
Nuclues-
Proton
Neutron
Electron
Atomic Number- how many protons an element has
Atomic Mass- average mass of an element
Symbol- 1 or 2 letters that represent an element
Periods- horizontal rows
Families/groups- vertical columns
Valence electrons- outer orbit electrons
Orbits
Know how many electrons are in the first three orbits- 2, 8,8
Metals
Alloys
Nonmetals
Metalloids


Telll how many valence electrons are in each family and what group number each family is in.


Alkali Metals- one valence electron and is located in group 1
Alkaline earth metals- two valence electrons and located in group 2
Transition elements
Lanthanides and Actinides- bottom elements
Carbon Family
Nitrogen Gamily
Oxygen Family
Halogen Family

Noble Gases

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