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Grade 10Modern Physics

The total energy of an electron in the first excited state of hydrogen atom is about -3.4 eV. Its kinetic energy in this state is

(a) 3.4eV

(b) 6.8eV

(c) -3.4 eV

(c) -6.8 eV

Profile image of Navjyot Kalra
12 Years agoGrade 10
Answers icon

1 Answer

Profile image of Aditi Chauhan
12 Years ago

        (a)

K.E. =  (13.6eV) 

Mechanical energy = (13.6 eV) 

\      K.E. in 2nd orbital for hydrogen

= - Mechanical energy

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