Question

Total energy of electron in the ground state of hydrogen atom is -13.6 ev. The kinetic energy of an electron in the first excited state is

Answer 1

Kinetic energy of electron kze2/2r

Potential energy of electron -kze2/r

=> P.E=−2(K.E)

Total energy = P.E +K.E

=−2E.E+K.E

=−KE =13.6