The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

75. The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol-1. The energy required to excite the electron in the atom from n = 1 to n = 2 is

A.            8.51 × 105 J mol-1

B.            6.56 × 105 J mol-1

C.            7.56 × 105 J mol-1

D.            9.84 × 105 J mol-1

Answer: 9.84 × 105 J mol-1