Why is hydrogen separated from the rest of IA?

Hydrogen is separated from the rest of Group IA elements in the Periodic Table due to its unique properties. While Group IA elements (alkali metals) are highly reactive metals with similar physical and chemical characteristics, hydrogen is a non-metal and exhibits behavior more akin to the halogens or even some of the transition metals. Its diatomic molecular form (H₂) and ability to form covalent bonds contrast with the metallic nature and ionic bonding tendencies of alkali metals. Additionally, hydrogen's position in the periodic table reflects its distinct electron configuration and reactivity patterns.