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Structure of the Atom — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
Question
The electrons revolve around the nucleus only in certain fixed paths called:
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Answer

The electrons revolve around the nucleus only in certain fixed paths called orbits.
They are $\text{K, L, M, N,}$ etc. Each orbit consists of a fixed number of electrons.
The electrons are distributed in the orbits according to the formula $2n^2.$

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