Question

energy of 5th orbit of hydrogen hydrogen like species is -e then the ionisation energy will be
a. E
b. 25E
c. 2.5E
d. E/2​

Answer 1

Answer:

= 13.6 eV (1 eV = 1.602×10-19 Joules) and n = 1,2,3… and so on so that the ground state has energy E1= -13.6 eV and the second energy level (the first excited state) has energy E2 = -13.6/4 eV = -3.4 eV.