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Structure of Atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom2 Marks
Question
i. How many subshells are associated with $\mathrm{n}=5$ ?
ii. Write the electronic configuration of $\mathrm{Fe}^{2+}$ ions $(z=26)$
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Answer

i. $\mathrm{n}=5, \mathrm{I}=0,1,2,3,[\because \mathrm{I}=0,1, \ldots . \mathrm{n}-1$ but $\mathrm{I}=4$ is not possible ' g ' orbital is not being orbital used $]$ $n=5, l=0,5 s, n=5, I=1$ is $5 p$.
$\mathrm{n}=5, \mathrm{l}=2$ is $5 d, \mathrm{n}=5, \mathrm{l}=3$ is $5 f$
ii. $1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^0 3 d^6$
[Electrons are removed from outer 4s orbital first and then from 3d-orbitals]

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