The sub-energy level having minimum energy is:

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Solution

The correct option is D 4s
The greater the value of $n + l$ , more will be the energy.

$4 s \Rightarrow n = 4, l = 0$
$n + l = 4$

$3 d \Rightarrow n = 3, l = 2$
$n + l = 5$

$5 p \Rightarrow n = 5, l = 1$
$n + l = 6$

$4 p \Rightarrow n = 4, l = 1$
$n + l = 5$

$4 s$ has the minimum energy.

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The sub-energy level having minimum energy is:

The correct option is D 4sThe greater the value of n+l, more will be the energy.4s⇒n=4,l=0 n+l=43d⇒n=3,l=2 n+l=55p⇒n=5,l=1 n+l=64p⇒n=4,l=1 n+l=54s has the minimum energy.

The correct option is D 4s
The greater the value of $n + l$ , more will be the energy.

$4 s \Rightarrow n = 4, l = 0$
$n + l = 4$

$3 d \Rightarrow n = 3, l = 2$
$n + l = 5$

$5 p \Rightarrow n = 5, l = 1$
$n + l = 6$

$4 p \Rightarrow n = 4, l = 1$
$n + l = 5$

$4 s$ has the minimum energy.