he ionization enthalpy of hydrogen atom is 1.312 × 10^6 J mol^(-1). The energy required to excite the electron in the atom from n = 1 to n = 2 is

Options :

1. 8.51 × 10^5 J mol^(-1)

2. 6.56 × 10^5 J mol^(-1)

3. 7.56 × 10^5 J mol^(-1)

4. 9.84 × 10^5 J mol^(-1)