The regular intervals after which the outer electronic configuration of elements repeats in the mode — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

In the modern periodic table, properties of elements repeat after adding 2, 8, 8, 18, 18, and 32 electrons. This sequence corresponds to the number of elements accommodated in the 1st through 6th periods. These are called the magic numbers of periodicity.