The Periodic Table

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The Periodic Table

• Chapter 4 Section 2

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Dmitri Mendeleev

• Russian Scientist who discovered a set of
  patterns that applied to all of the elements in
  regards to atomic mass and their ability to bond.
• He created the first periodic table

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Periodic Table

• An arrangement of the 100 elements showing a
  repeating pattern of their properties
• The properties of an element can be predicted by
  its location on the periodic table.
• Arranged in order of increasing Atomic Number.
• Mendeleev organized his periodic table in order
  of increasing Atomic Mass The AVERAGE mass of
  all of the isotopes an element.

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The Periodic Table

• Elements are organized into rows and columns
  based on their atomic number.

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Atomic Numbers, Symbols and Mass

• Atomic is the smaller number and the number of
  protons in the nucleus.

Element Symbol
47 Ag Silver 107.868
Element Name
Atomic Mass is the all the protons and neutrons
added together. (average)
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Groups or Families Elements in a group have
very similar characteristics i.e. bonding,
reactivity, valence electrons
Periods- Elements in a period are not alike, but
gradually change as you move from left to right.
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Periodic table is also arranged in
classesMetals, Semi-metals, Non-metals, and
Inert gases
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