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Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
Question
Why is energy of electron negative?
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Answer

When electron is at infinite distance from nucleus, its energy is zero. When it is brought near to the nucleus, energy becomes less than zero, i.e. negative due to force of attraction between nucleus and electron.

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