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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
As an electron is brought from an infinite distance close to the nucleus of the atom, the energy of the electron-nucleus system :
  • A
    Increases to a greater positive value
  • B
    Decreases to a smaller positive value
  • ✓
    Decreases to a smaller negative value
  • D
    Increases to a smaller negative value
✓

Answer

Correct option: C.
Decreases to a smaller negative value
c
The energy of an electron is considered as zero at infinite distance from the nucleus as electron come nearer it gets bounded from the nucleus so the energy is negative. Energy is inversely proportional to the distance so, as the distance decreases energy increases to a greater negative value.

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