Q20 / 99 · NTA Abhyas (JEE Main) 2020 · Chemistry · Structure of Atom

The energy of an electron in Bohr's orbit of hydrogen atom is −13.6 eV . The total electronic energy of a hypothetical He atom in which there are no electron-electron repulsions or interactions is

  • A
    27.2 eV
  • B
    -27.2 eV
  • Correct answer
    C
    -108.8 eV
  • D
    108.eV

Solution

Electronic energy per electron =-13.6×4 eV

Total Electronic energy =-13.6 × 4 × 2=-108.8 eV

Hence, the correct answer is option: 'C'.

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