"You canker blossom!" 3 Shakespearean Insults
periodicity pe·ri·o·dic·i·ty (pĭr'ē-ə-dĭs'ĭ-tē)
The quality or state of being periodic; recurrence at regular intervals.
The tendency of chemical elements to have similar properties when arranged according to their atomic number.
The position of an element in the periodic table.