Home » In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom Atomic Structure MCQs In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom January 8, 2022 8 Views Q. In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom A. 3.4 eV B. 6.8 eV C. -13.6 eV D. +13.6 eV Answer: 3.4 eV