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The physical and chemical properties of ...

The physical and chemical properties of elements are periodic functions of their atomic numbers.
a) The atomic number of an element 'X' is 19. Write the group number, period and block to which 'X' belong in the periodic table.
b) Name the element with
i) highest electronegativity and
ii) highest electron gain enthalpy

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MAXIMUM PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-EXAMPLE
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