The ionization energy of hydrogen atom is \[-13.6\,eV.\] The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is (Avogadro?s constant = 6.022 × 1023) [BHU 1999]

• A.                 \[1.69\times {{10}^{-20}}J\]        
• B.                 \[1.69\times {{10}^{-23}}J\]
• C.                 \[1.69\times {{10}^{23}}J\]         
• D.                 \[1.69\times {{10}^{25}}J\]