What is the basic theme of organization in the periodic table

The basic theme of organization in the periodic table is that elements are divided into groups and periods based on their properties. Elements that exhibit similar properties are placed in the same group while elements that have the similar number of shell are placed in the same period. This arrangement is based basically on the increasing atomic number of the elements in the periodic table. Atomic number is used for the arrangement of the element because it is a fundamental property of all elements.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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