Which one of the following pair of elements has similar properties? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

The similarity of chemical properties of elements is due to the similar in outermost shell electronic configuration and the elements with similar outermost electronic configuration are classified as groups. Therefore, 2 2 6 2 1 Aluminum - 1s 2s 2p 3s 3p (Al) (z=13) and 10 2 1 Gallium - Ar 3d 4s 4p (Ga) (z=31) have similar properties. PERIODIC PROPERTIES 32