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(B) To determine the electronic configuration of ions,we look at the number of electrons after ionization:$1$. $Li^+$ ion: $Li$ $(Z=3)$ has $3$ electr

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Potassium and calcium

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(B) To determine the electronic configuration of ions,we look at the number of electrons after ionization:$1$. $Li^+$ ion: $Li$ $(Z=3)$ has $3$ electrons. $Li^+$ has $3-1 = 2$ electrons. Configuration: $1s^2$ (similar to $He$).$2$. $Na^+$ ion: $Na$ $(Z=11)$ has $11$ electrons. $Na^+$ has $11-1 = 10$ electrons. Configuration: $1s^2 2s^2 2p^6$ (similar to $Ne$).$3$. $K^+$ ion: $K$ $(Z=19)$ has $19$ electrons. $K^+$ has $19-1 = 18$ electrons. Configuration: $1s^2 2s^2 2p^6 3s^2 3p^6$ (similar to $Ar$).$4$. $Ca^{2+}$ ion: $Ca$ $(Z=20)$ has $20$ electrons. $Ca^{2+}$ has $20-2 = 18$ electrons. Configuration: $1s^2 2s^2 2p^6 3s^2 3p^6$ (similar to $Ar$).Comparing the ions,$K^+$ and $Ca^{2+}$ both have $18$ electrons and the same electronic configuration.

List-$I$ (Orbital)	List-$II$ (Radial nodes and nodal plane)
$A$. $2s$	$I$. $1$ Radial node + two nodal planes
$B$. $3s$	$II$. $1$ Radial node + one nodal plane
$C$. $3p$	$III$. $2$ Radial nodes + No nodal plane
$D$. $4d$	$IV$. $1$ Radial node + No nodal plane

Choose the pair whose ions have the similar electronic configuration.

Similar Questions

Match the $LIST$-$I$ with $LIST$-$II$:
List-$I$ (Orbital) List-$II$ (Radial nodes and nodal plane)
$A$. $2s$ $I$. $1$ Radial node + two nodal planes
$B$. $3s$ $II$. $1$ Radial node + one nodal plane
$C$. $3p$ $III$. $2$ Radial nodes + No nodal plane
$D$. $4d$ $IV$. $1$ Radial node + No nodal plane

The energy of an electron of $2p_y$ orbital is

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Which set of quantum numbers is correct for the unpaired electron of a chlorine atom?

$(i)$ An atomic orbital has $n=3$. What are the possible values of $l$ and $m_l$?
$(ii)$ List the quantum numbers ($m_l$ and $l$) of electrons for $3d$ orbital.
$(iii)$ Which of the following orbitals are possible? $1p$,$2s$,$2p$,and $3f$.

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