Question

what is periodicity?​

Answer 1

Answer:

the tendency, quality, or fact of recurring at regular intervals. Chemistry. the occurrence of similar properties in elements occupying similar positions in the periodic table.

Answer 2

Answer:

The periodical repetition of similar properties of the elements after certain regular intervals when the elements are arranged in order of increasing atomic number is called periodicity. This property is due to the recurrence of similar valence shell configuration after regular interval.