the ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is its excitation energy is the ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state August 21, 2020 Category: Chapter 30 - Atoms , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related