In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom

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