Bohr’s radius for the H-atom (n =1) is approximately 0.530 A^o. The radius of the first excited state (n=2) orbit is : Bohr's radius for the H-atom (n =1) is approximately 0.530 A^o. The radius of the first excited state (n=2) orbit is : November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Facebook Messenger WhatsApp Share this:TwitterFacebook Related