s-block                                               PERIODIC PROPERTIES
   It contains 1 & 2 group.                          1. Atomic Radius is the total distance from
   Its General Electronic Configuration is ns0-          an atom’s nucleus to the outermost orbital
    2                                                     of electron. Smallest atom is hydrogen
   Element Properties are Soft Metal,                    and largest is cesium.
    Electropositive, basic oxides, reactive           2. Ionization Energy is the energy required
    metals with low ionization, good reducing             to remove an electron from the atom in the
    agents                                                gas phase.
                                                      3. Electron Affinity reflects the ability of an
p-block                                                   atom to accept an electron.
                                                      4. Electronegativity is a measure of the
   It contains 13 to 18 groups.
                                                          attraction of an atom for the electrons in a
   Its General Electronic Configuration is ns2           chemical bond.
    np1-6                                             5. Metallic Character is the chemical
   It includes metals, non-metals and                    properties of elements that are metals. The
    metalloids.                                           strongest natural metal is Tungsten.
d-block                                               Moving Left → Right
   It contains 3 to 12 groups.                          Atomic Radius Decreases
   Its General Electronic Configuration is (n -         Ionization Energy Increases
    1) d1-10 ns1-2                                       Electron Affinity Generally Increases
   It has high melting and boiling points and            (except Noble Gas Electron Affinity Near
    form coloured salts.                                  Zero)
   These elements are transition elements.              Electronegativity Increases
f-block                                                  Metallic Character Decreases
                                                      Moving Top → Bottom
   It contains the rest of the periodic table,
    has no group numbers and comprises                   Atomic Radius Increases
    lanthanides and actinides (the last two
                                                         Ionization Energy Decreases
    rows).
                                                         Electron Affinity Generally Decreases
   Its General Electronic Configuration is (n -
                                                          Moving Down a Group
    2) f1-14 (n - 1) d0-1 ns2
                                                         Electronegativity Decreases
   Actinides (5f series) are radioactive
                                                         Metallic Character Increases
    elements.
   It has high melting and boiling points and
    form coloured salts.
                                                 273