alleryFor the ground state of singly ionised helium (He⁺, Z = 2), the energy of the electron is:
A−54.4 eV
B−27.2 eV
C−13.6 eV
D−108.8 eV
Answer & Solution
Correct answer: A. −54.4 eV
We have E = −13.6 Z²/n².
That is E = −13.6·4/1.
So E = −54.4 eV.
Keep practising Modern Physics
Browse all Modern Physics questions for NEET UG, or explore more Physics topics.
Related questions
True or false: modern physicsMatch each photoelectric termThe de Broglie wavelength of an electron in the n = 1 Bohr orbit of hydrogen equals the:In Bohr's model, the centripetal force on the electron is supplied by the:The energy required to excite a hydrogen atom from the ground state to its first excited sNumber of spectral lines emitted when a hydrogen atom de-excites from n = 4 to n = 1 (all The wavelength of a photon emitted when an electron in hydrogen jumps from n = 3 to n = 2 Bohr's model could explain the hydrogen spectrum but failed to: