The radius of the innermost electron orbit of a hydrogen atom is 5.3×10^11 m. What are the radii of the n = 2 and n =3 orbits? The radius of the innermost electron orbit of a hydrogen atom is 5.3×10^11 m. What are the radii of the n = 2 and n =3 orbits? September 13, 2021 Category: Chapter 12 - Atoms , NCERT Exemplar Class 12 , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related