Question

what is periodicity and periodic properties​

Answer 1

Answer:

The periodicity in properties is due to repetition of similar outer shell electronic configuration at a certain regular intervals. In modern periodic table is based on modern periodic law in which elements are arranged in increasing order of their atomic numbers.

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Answer 2

Answer:

The periodicity in properties is due to repetition of similar outer shell electronic configuration at a certain regular intervals. In modern periodic table is based on modern periodic law in which elements are arranged in increasing order of their atomic numbers.