Periodic Classification of Elements

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brief description of Chemistry PCE chapter
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Periodic Classification of Elements
  1. Laws
    1. Dobberinor Law
      1. the three elements in trads are placed in increasing order of atomic mass. The Middle element atomic mass is roughly average of first and last elkement's atomic mass
      2. NewLands Law
        1. The elements are placed in increasing order of atomic mass. the every Eighth element have a similar porperty as first element
        2. Mendeleevs Laws
          1. The properties of element is periodic functions of there Atomic Mass
          2. Modren Law
            1. The properties of element is periodic functions of there Atomic number
          3. Groupnumber
            1. In periodic law there are 18 verticle columns known as group
            2. periods
              1. In periodic law there are 7 horizontal rows know as 'Periods"
              2. Atomic Size
                1. The term atomic size refers to the radius of an atom. The atomic size may be visualised as the distance between the certer of the nuclues and the outtermost shell of an isolated atom
                2. ionization
                  1. It is minimum energy require to remove the outtermost electrons is called Ionization Energy
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